<human>: My (19f) girlfriend and I have been dating for about two and a half years. We just got "back together" after a three to four month break up, because she did not know if she wanted to be with me. During the break up, I learned a lot about myself, and so did she. We "talked" to different people, and she even had a rebound relationship. Which I know for a fact was only rebound. 

This past month has been going great, except one thing. Lack of intimacy. We kiss, and cuddle. And its about 50/50 initiated most of the time. But nothing past that. We talked about it last night, and she said she didn't know why she does not want to be sexual with me. Every time I start kissing her with more drive, she starts to remember the bad things about the past us. And also she basically said, she lacks libido because I have no driven passion, like I did in the beginning of the relationship. I had many hobbies, and friends, where now I do not. And I am too passive in the relationship. I let her make decisions, I always agree with her, I always want to be with her, etc... 

So I'm really just wondering how I can become more aggressive, be more of a man, i guess. I'm a nice guy, but in the beginning of the relationship I was still "me". I was somewhat of an "asshole" because, well I had better things to do. Where now, in my mind the best thing I can do is be with her. I want this for me, because I feel lost. In my life, and in my relationship. 

After we talked about it, I said I'd work on me, and asked her to accept of the past. We both agreed that we do really want this to work out, because we love each other. 

If you need any more information, just ask! I'd really, really appreciate the help. Thanks guys.

Can you summarize the given text in a few sentences?
<bot>: I have become more passive over the course of my relationship with my girlfriend. How do I break this and become more aggressive, like I once was?