I need relationship advice! What should I do?

I have been dating a guy for 5 months now and he is a very sweet, sensitive, attentive guy. We are both crazy about each other and get along really well. I have never had such strong feelings for a guy. He always tells me how special I am and how he has never felt this way about any other girl. I'm the outgoing, confident kind of person and I can openly communicate with my partner if I need to. I only see him on the weekends because we are both away at school but I have seen him every weekend since we met because we enjoy that time together. Keep in mind he is insecure and tends to get jealous when we go out and other guys come up to me. But he holds it in and never gets mad at me. About a month ago, I noticed how he started to kind of pull back and not show affection through texts like he normally would. And he also didn't call as much so I confronted him about it. He said he was stressed with school and his feelings hadn't changed.(Also he bottles up his feelings and completely tries to avoid confrontation) So when I came home to see him that weekend he completely avoided seeing me and was really short when I tried talking to him. This was a complete 180 for him. He continued to act like this until the next weekend I saw him in person. And everything was perfect again. He acted crazy about me again like he used to. But as soon as I went back to school he started withdrawing and acting distant again. I once again confronted him and told him his behavior was bothering me and that I felt like I was being put on the back burner and that if something was bothering him that I am here to support him. But he has continued to withdraw more and more and I haven't seen him in 3 weeks. I sent him a long message last week telling him that we needed time apart because he wasn't being considerate towards my feelings and I felt like he needed time off from the relationship to figure out what's important in his life. Two days later he begged me back and said that he wants to be with me and that will do what it takes to make it work. So i asked to spend time with him on Sunday and he said he would like to see me. When Sunday came, he never called or texted me and then when I asked him what time we could get together he said he was busy with school. He is putting me off for some reason and I can't figure out why. I am constantly getting mixed messages because he wants to be with me yet puts no effort in to see me. Should I end things with him or just ignore him for a while?

Hi, This seems to be a very typical situation. The weekends only thing is like having a long dist. relationship. Not easy. He may have met someone else??? Ask about that. Really ask about it. A lot of guys tend to keep the girl on a yo-yo. We don't want to lose you but we are not sure about keeping you either. Communication is the best way to sort it all out. The guessing game does not work well and only adds to the stress of it all. Talk to him about it all.