What the best way to handle this?

Okay recently I had a boyfriend (my first boyfriend) named George me and him went out for about a week and one of my close friends told me he saw him touching other girls and stuff. So I broke up with him. (I still really liked him and still do) okay so it was last night and my friend Claire just heard about the whole thing and started getting mad so she asked for his number to chew him out over it (I didn't think it was a good idea but) but she actually started flirting with him and now they have a crush with each other. Claire is aware that I really like George still. What can I do?....ps they both r in realationships already.(to different people)