Relationship/Friendship Advice.?

Hi, I'm a freshman in College. I came into the University wondering how I will I meet new people and how college is gonna be. I never expected to be actually in a relationship, but I met this guy. I was head over heels in love with him. He was my first lover. We had been together for about 2 months but I guess school work and relationship has taken a toll on us. My first quarter in college was not great, I have to do better. I feel like he felt guilty that I spent more time with him and not studying. Part of it is true, but I don't want him to be burdened by that thought. I guess today he decided to be friends, again. When this quarter started, second week of school he wanted to be friends, but I wanted a romantic relationship, so I said yes to him. I told him we can be best friends. But later that night, he decided he didn't want to be friends, he wanted to be together again. So we were until today. He decided we should be friends and again I said yes, and this time I'm more inclined to be friends but at the same time, I think I don't. What if he asks me again that he wants to be together and not just friends? I don't want to be any-one's "doormat." I don't want a relationship where it's convenient for the other person and not me. Right now I am sad, but he wants us to be friends, best friends. I guess he wants to be friends because we don't want to pressure each other what to do when we are alone. When ever I am in his dorm room, I've wanted to hug him and give him a kiss, but I don't because I don't know about his mood. He has his midterms coming up this week, and I didn't want to stress him into doing anything. I really like this guy, but again I don't want a relationship where one can come and go anytime they please to. When I was with him, he naturally is more social. He hangs out with his friends, goes out a lot, but me, I'm not. I'm the oldest and my dad wanted to "protect" me. Whenever they was an event held by my after school program like stay overs, my dad wouldn't let me go. I have asthma and thought somehow I might get sick and something bad might happen. My dad has been very overprotective of me. I'm 18 right now. I have never really had the chance to hang out with my friends outside of school. I feel like I'm socially "undeveloped." Well to sum it all up, my lover who was my boyfriend wants to be best friends. He feels then we are more able to talk more and communicate? I don't know what to do. I just said yes to make him feel better and I'm not sure what I want. I have learned about myself that I have poor communication skill, I can't project my ideas and feelings to other people easily, I tend to keep it all in. I also learned about my self that I'm to "clingy". I want to do stuff together with him and just spend time together. I'm at a university, I have this much clear and in mind: I'm here to get my degree. I'm here to study. I think the reason we broke up is so we both can focus more on school work. But at the same time, I'm sad because of what happened today. What should I do?