Please take time to read this I need advice!

Me and my boyfriend have been together for over 2 and half years (known eachother for about 3 now). Everyday is for the most part a good day we don't really fight and we enjoy eachothers company no matter what we are doing but sometimes when we don't see eachother I start to feel not confident in the relationship. I know I love him more than anything because on days that we're not really talking I feel an emptiness in my chest that won't go away until we've talked things out and everything is back to normal. We both were cheated on in our previous relationships before we startiing going out so its not that I don't trust him, but I do worry that he'll leave me for someone else sometimes. I'll see pictures of him (his guys friends are in the pictures too) but maybe there's a few girls here and there that I don't know and on occansions like this I wasn't invited to go or I couldn't because I had work the next day. We've always had atleast one night a week of not seeing eachother which is fine but generally I stay home alone those nights which doesn't bother me but sometimes I feel like I should go out? I guess what I'm worried about is there's a lot of things he likes to go out and do that I can't be there for and I know he's with other girls and he'll have those memories wiitht them and his friends and I won't be there. I never really used to worry about this but back in december he was acting strange and I eventually got out of him that sometimes he doesn't know if he could so me in his future. That was heart breaking because for that whole month before and weeks leading up to that conversation he was talking about getting married. Then exactly a week ago he came over and was talking to me about saving up and moving in together in a year or so. I thought it was so sweet and nice and it felt so good to hear him say that after everything we had been through since december. But then this weekend he went out everynight since thursday (I was with him friday and saturday) and I knew he was tired but sometimes he gets distant. And I guess because I over think everything I asked him about it late last night and he kinda freaked out on me and asked why I keep bringing this up. He doesn't see how what he does isn't enough for me. But all I asked was if he was ok and said if you're being distant because you're tired than that's it. Sometimes deep down I just want the reassurance and I don't think he understands that and now I don't know how today is going to go because now I don't know if he's happy with me right now and I wish I had never asked =( please help me shed some light on this situation.

Overthinker, I decided to respond to you because I tend to overthink things, too! So I know how you are feeling, and I can relate. You have been together for a long time, which makes me feel you have a pretty solid relationship. The fact that he has even brought up the future at all is a good sign, most guys don't like to think about that stuff in my experience. It sounds like your boyfriend is more extroverted than you, based on what you said about how he likes to go out and you like to stay in. Don't feel bad about that, by the way, I prefer to stay in, too. That is perfectly ok, the two of you balance each other out. For a relationship to work, you need to understand when the other person needs a little space. Sounds like he just likes having a little time apart. He always comes back, right? Just remember that he might feel like you are smothering him if you ask him where he has been all the time, and that could make him more distant. Just take it easy on him, and let him do his thing. If you find real evidence that he is cheating, go with your gut, but at this point I really don't think he is, based on what you have written. Never assume the worst unless you know for a fact something is going on. I really hope this helped!