Left in the dark

Here's a background of the relationship: (sorry it it's lengthy!) I met a guy on Tinder (the silly dating app), and we met up and hit it off right away. The first night we hung out, he disclosed to me that he is a recovering addict. Normally, that would freak me out, but I got a good gut feeling about him. So I kept my mind open. As it turns out, he is a wonderful person. He is smart, kind, funny as hell, and he is loved by everyone in his life. I saw the way he talked with his parents/sister and I could tell that they adored him. They truly care about his well being, and I could tell that he was raised right. We spent a few weeks together in that "honeymoon phase"- cute texts, snapchats, we were together all the time, etc. I was cautious not to move too fast, because I didn't want us to get sick of each other. But at the same time, I did my best to go with the flow. He wanted to meet my parents- he said that he cared about me and he wanted to make sure that they liked him. (They loved him, by the way). He introduced me to his parents/sister over FaceTime (they live in a different state), and we got along very well. They are genuinely sweet people. He also wanted to make us official- something I was surprised by, because normally guys don't take that first step. But I agreed, as long as we didn't take it too quickly. (i.e. We'd spend more time apart, etc., to have a healthy relationship). He fully agreed, and everything was going well. I noticed that he made me feel differently than I had felt with past boyfriends. (I've had a lot of dates/boyfriends.) He made me feel a certain kind of happy- something I couldn't put my finger on. But I loved every minute of it. I felt fully relaxed, at ease, and just purely happy. It was different than I'd ever felt with someone. (Cliche much?) But it was true.. I felt very good with him- and he felt the same with me. We were on the same page, which was new for me. I'd never synced so well with someone so quickly before. There was no power struggle. We communicated very well. Etc. He made me feel really good, and vice versa. But after a few weeks of that bliss.. things changed. He became distant and cold, and I didn't understand why. At first I was extremely confused. I know about the "guy pull away"-- when they've been with a girl for a while and then they pull away to get space. But we'd only been together for a couple of weeks. And if anything, he was more into it than I was. I wasn't being clingy, etc. He shut everyone out- me, his friends, his parents. We all noticed it and finally a friend of his got his attention about it. He ignored me on and off for about two weeks. He'd text me short replies, if anything at all. It hurt, and it confused the hell out of me. He apologized for how he was treating me (and everyone else), and he told me that he didn't know why he felt that way all of a sudden. He was normally a positive, happy guy. He ran hot and cold for about 4 weeks total, and I was beyond confused the whole time. I did my own research on the recovery process for addicts (I knew nothing about it before) and I learned that he's still very fragile right now. I also realized that he might've started dating me just to fill a void. I brought this up to him and he told me he wasn't filling a void- he truly did care about me and wanted to see me happy. But he was unsure how to go about all of it. I accepted that, and we decided that maybe we could try again in the future. But a few days later, he texted me a lot of things.. He told about how happy he had felt those first few weeks, and that he knows he treated me poorly in recent weeks, and that he was working hard to get to the root of the problem. He wanted to be better all around, and he wanted to treat me right. I was cautious while listening to this. I have been in a verbally/emotionally abusive relationship before, so I'm aware of the signs I need to watch out for. But like I said earlier, I got a good gut feeling about him. I know deep down that he is a good person, and he's trying hard every day to improve himself. After weeks of this confusing and sometimes hurtful hot and cold behavior, we finally settled on not being together, but remaining in touch. Last week, we were on good terms and we decided to hang out. But the night he was supposed to come over, he disappeared. We were fine- no problems at all. Happy conversation, etc. He was taking a while to get to my house, so I asked him when he thought he would arrive, and he never replied. I didn't hear from him that night or the next day, so the next afternoon I asked if he was okay. No response. I thought maybe he lost his phone, or that he was possibly in an accident or something. (Worst case scenario, but him just disappearing made my mind wander). I haven't heard from him in a week. He never responded, but I noticed that he looked at my SnapChat picture. That told me that he's fine, he's just ignoring me. So once again, I am beyond confused. I don't understand the logic of people just walking away- never have. It made no sense that he was great one minute, and then gone the next. With no explanation. I have no idea what happened. My head is telling me to walk away, because this is a clear sign that he doesn't want me in his life anymore. But my heart is stuck. I care about him, and my feelings for him are still there. I have been very patient over the past month trying to figure all of this out. (I'm not normally too patient). Something in my gut was telling me that he was worth it. I don't know why. I know that I cannot save/fix him. I never tried to; only he can do that for himself. But it's been a week of silence, and it's finally getting to me. I feel quite pathetic- I know most of you will tell me that I should be walking away. But I can't get this out of my head and my heart. I just want to stop hoping and wondering. Up until now, we'd never gone an entire week without communicating. But I haven't said a word. I'm trying to rationalize that he doesn't want me around anymore, but for whatever reason, it just won't click. I have been used and dumped before, I know what that's like. However this didn't seem like it was headed in that direction. I know I sound like a cliche, but I need an outside perspective. I am having a hard time moving forward.