<human>: Give me a shortened version of the text

So I recently fell in love with a girl(that's a whole different story) and I'm trying to tell the people I use to have relationships that I cant act the way I was with them. 

I honestly think I have a serious issue with flirting with people and having these mini relationships with multiple people. I know that the person I'm seeing is the one, and I'm willing to do anything to make her happy and I need to move on with the past to do so. 

I guess I'm just asking how do I go about telling the others about my situation? I have never ended a relationship in my life because I'm really soft and it hurts me to see that I hurt someone else. I've always been the one who is dumped or the other person and I would just stop talking. What is a good way to go about this and try to be as nice as I can be?
<bot>: I'm in love and I have multiple past romantic relationships that I need to get rid of to finally move on. I've never dumped someone because I'm soft. How do I let them down easily?