not getting anywhere

Hello everyone, I am in desperate need of a listening ear, and perhaps a piece of advice.
I have posted on here before, but of course I don't know if anyone would remember.
However, I have been in a relationship with my fiance for almost 3 years. As with any relationship, in the beginning he treated me like a princess. He was probably the best boyfriend I had had. After a short period of time I ended up getting pregnant, after that things really began to fall apart. (go figure). He left and then came back, but after that he was a different person. I believe that was because I didn't put up a fight, I just let him come and go as he wanted. He started to stay out all night and didn't care about how I felt anymore. Since then, nothing has changed. It's all about him. We have been through hell with his problems with addiction, he has told me he resents me because since me he hasn't been able to do the things he used to with his friends and so forth, he knows I'm insecure. INtimately, our relationship has gradually declined, sex maybe once a week or once every two weeks when ever HE wanted to. Now, it has been almost one month since he has even touched me. Sunday I was having a really hard day and asked him to stay home with me that I needed a friend. He kissed me on my head and said it'd be okay and left. He went to hang out with his friend, didn't call didn't come home until 9 at night after leaving around 11:30.
I don't know what to do anymore, I don't want to do anything drastic only to regret it later. But, to be honest no matter how many times his mouth says "I love you" I don't think he does. It feels like he could care less.
Any Advice?

Unless you BOTH want to work on the relationship, it isn't going to work. It sounds like he would rather be single and is trying to have that as well as have the relationship with you. That can't work. You are going to have to talk to him and decide if YOU really want to be in this relationship. And do it before you wind up getting married.

Good luck.

Save your breath. Let him go be single, he is already anyway.