<human>: I'm not going to lie. I used to be a man who played girls. I was a player. I regret it and wish I never was. Everything changed this year though. I've known this girl since 7th grade (10 years by now) so she knows how I am with women. A few months ago, I was alone with this girl on a small hill, we were talking and having a good time. Suddenly, she laughed and smiled, and I realized I love this girl. I may have never felt love before, but I know I am in love with her. I told her how I feel, however she doesn't believe me. She tells me that I'm just going to find another girl and move on sooner or later. How do I convince her how I feel?

Can you give me a shortened version of the text?
<bot>: used to be a player, fell in love with best friend, doesn't believe me when I say how I feel.