Someone please help this situation is driving me crazy?

I have been "dating" this guy for a little over a year. When we first started talking we both was not looking to be in a serious relationship and we both had that understanding. I know that he has other females that he is seeing and it did not bother me. He is very open and honest with me and at times we are more like best friends than anything else. He. began telling me he loved me and I would not say it back to him because we agreed thats not what we wanted. He began making comments about what if we had a baby together and I would brush it off only because he would stress the fact that he did not want anyone to like him and he was not looking for a serious relationship at all and I was not either. We have moved in together because we were both looking to get a place and figured we could help each other out. Living together made us get closer however it has also made the nature of our relationship change. I started to develop striistrongings for him and began to take his "I love yous" and baby comments serious. Living with him has made me more involved in his lifestyle and his dealings with different women is starting to bother me. He does not seem to get that the nature of our relationship is starting to change because he started to tell me that he love me and what not. I really care about this dude and I know he really care about me but I feel like I am stuck. I starting to fall for him and I don't like him dealing with other women. He just think I'm supposed to wait around and see what becomes of our relationship. I am the type of person that do not like to wait around and waste years of my life waiting to see if a relationship is going to work or not. Nor do I want to wait in line to see if I am the woman he is going to pick out of the bunch. I just really don't know what to do. We have about 6 months on our lease left. This whole situation is just really stressing me out. I want to be with him but I always want to get the heck away from him because I don't want to deal with the way he lives his life. I have told him plenty of times how I feel and he has told me how he feel but nothing has changed. I'm so lost.