Do i have relationship problems and / or commitment issues?

When ever I am in a relationship its all grate the first week or even month but after that I always want the guy to leave me alone! I don't understand it because all of my friends love the attention they get from there boyfriends and even want more but I just want to be left alone. why cant I stay in a relationship with out going crazy? I cant stand holding hand or all the tuchy feely stuff that comes with being in a relationship. How do I change that? what do I do to keep from feeling smutherd when all my boyfriend does is txt me or want to talk? why do I feel this way?