Where is this relationship going... what is wrong with me!?

I have a girlfriend named Jessica, we have been going out for one month now and I see her at least once a week. The first few weeks we went out to movies and resturaunts, now we go over to each others houses and watch tv or play games like truth or dare. Its hard for us to start convos because we are both kinda shy and self concious. I like her a lot, and I would say that I love her but I don’t think she loves me. Is that just because we have been going out for only a month and the relationship will probably get better? Or does it mean its just another dieing relationship? It has also been changing in that she used to call me more than she does now, and I usualy am the first one to send a TXT msg on the phone. Maybe its just that she isnt obsessed with me any more, but still likes me a lot? or could it mean she is getting over me? She has never said she loves me, and Iv said I love her one time, she said that was really sweet of me. We are officialy girlfriend boyfriend, but I just don’t know where its going. I also am shy around her, like I normaly am, but when do I get over it, I mean its been a freakin month… I have like totaly lost the personality I had before I met her, I don’t know why, and its sad because I really do love her and I dont want to screw this up. Also its strange, when Im around her I unconciously just touch her, like hold her hand or put my arm around her, I feel like I ALWAYS need to be in physical contact with her, and I kinda think she doesnt like that, but she has never said anything about it… All we have done sexualy is kiss and hug goodbye, I guess maybe she is just taking it really slow, but I just want to make sure everything isnt going down hill, and I want to know what I should do to be myself again, and be the person I was when I first met her and didnt really care what she thought about me. Please help?