Feeling alone, it's so hard.

So, I recently wrote a thread about my life and my story. I got a lot of good advice from people. I was previously married to a guy, which was the biggest mistake of my life. It's was a horrible relationship, and eventually I got out and told him I wanted to be with women. Fast forward to over a year, and now I'm living in another state with my girlfriend. We've been together for about 5 months now, and Ive never been more in love. She means everything to me and I can honestly say I could see myself with her for ever. She knows my whole story, but we never talk about the married thing. I'm still in the process of getting a divorce. Even though she knows, and she still chose to be with me, I know it still bothers her. Which is why we never talk about it. And every time I do, she gets extremely awkward and then ends up changing the subject. My thing is, I want to be able to talk to her about everything. I want her to know how I'm feeling just like I want to know how she's feeling. I let her know that I was going to start seriously persuing the divorce process. She asked me, if since I'm still technically married if that meant I wouldn't be able to be remarried until the divorce was finalized. I said yes and her response was "well that sucks for you."...I don't know how to take her sometimes. I can't ever tell if her sarcasm is to cover up that the whole situation actually does bother her, or if she's just joking and it doesn't really bother her. I love her more than anything, and I never want to loose her. I just don't know what's the best way to handle the situation. It's so hard trying to prove myself, prove that just because I was with guys before doesnt mean I would ever go back. I wouldn't. It's all so complicated and sometimes I feel so alone because I feel like I'm constantly being judged for my past.