I like him but I dont... I dont know!? Help :(?

Kay so, I've had a thing for this guy for 3 years we dated once two years ago but I wasn't ready, then again last april. He and a couple other friends slept at my house and we goofing around and he finally asked me out (again) I told him I wasn't ready because of personal reasons and I didn't want to mess things but between us because he meant a lot to me. He said he would wait for me but didn't act any different. I just wanted a little bit of space to kind of absorb it all. Oh yeah and a kind of big detail is that he had kissed me earlier that day and I felt so weird after and I don't think I liked it but I don't get it because I want to be with him. I felt so weird after that he defiantly noticed and asked me about it. I told him it was nothing. I tried to continue dating him to see if I would just get over whatever was bugging me. I did miss him when i wasn't with him and liked talking to him all he time but I always found my self subconsciously avoiding to kiss him.. Another thing that annoyed me was that he ALWAYS..... Im not even over exaggerating.. had to make sexual jokes. Sometimes its funny but when its all the time its just annoying and immature and all I could think was that I want to have a real conversation.. that I know he is capable of. anyways, we still flirt a lot and I told him I still like him, should I ask him to be my date (not boyfriend) to my farewell ceremony ?