For me, when I fell in love, I didn't realize it right away. This guy, his name is Joey, and I were just hanging out all the time. He was trying to win me back because we had been dating previously and broken up.
I didn't realize that I was in love with him until he was gone. (Long story short, he got jealous and stopped talking to me and I had no idea why we weren't talking at the time.) I realized that I missed him. I wanted to be with him. I wanted to see his smile, hear his voice, hang out with him again. He was on my mind constantly. It was so hard to be away and not just because I missed him. I couldn't focus on anything but him. I felt obsessed really. Finally, I realized... I was in love with him. I didn't just love him, but I was IN love with him. This hit me hard.
For a while, I had no idea what to do. I'm someone who dates a lot. I go through boyfriends like damn candy and I've never cared about break ups or anything. None of that bothered me. When I was away from Joey and we weren't talking, it really upset me. I wanted to find out why, to any extent. After 3 weeks I finally caught up with him at his house and it took literally 8 hours to figure out why he wasn't talking to me.
I can't say if you're in love with your girl of not. But for me, being in love is thinking about him constantly. Wanting to be with him regardless of all his faults and all the crap and drama that comes with being around him. I want to be with him anyway. He's someone I'm willing to work hard to make things work out with and with him that's insanely difficult. *rolls eyes* lol. But I love him. I'd wait for him to come around, even if that means going about my life without him for a few years. If that's what it takes. I love him. He's everywhere for me, even when he's no where in sight. I still think of him constantly, I still care, I want to see him, talk to him, support him, help him. For me, he's my definition of love. Yes, he can be insanely difficult to deal with at times, but I find he's worth it. He's worth all the pain he puts me through because he brings me to life and makes me happy in a way that no one else ever has. :) For me, that's love. It may be different for you.