<human>: Summarize the given text in a few sentences.

Hi fellow redditors
I just got of a three week relationship with a girl that only was using me. Meanwhile I met this girl about a week ago through a friend of my mom, we started talking and I started falling for her, she resembles my ex a lot, but I didn't wanted to because she has a boyfriend and although they are having trouble she's completely insane for him and she told me even if she was single we never workout and I don't want to lose her friendship. 
So basically I'm here to ask for your advice on how not to attach to quick to a girl to avoid getting hurt again, and trust me this happens way to often.
<bot>: Get attached to a girl way to fast and don't wanna lose her friendship and want to beat this problem of getting attached to fast to girls and avoid getting hurt.