May have ditched me for another guy ( complicated story)

Ok so this is the deal, I'm 14 going on 15 and my girlfriend and I had been going out for 3 months. She said to me that she had loads going on in her life at the moment and wasn't ready for a relationship with me and needed some space and time, so I agreed so we broke up, but then ( assuming you all know what a fansign is but if you don't its when a girl tags a boys name on their boobs or legs and then sends it on to the boy they tagged on there) a person who I drifted from ( a boy)ages ago and was in the year above me got a fansign off an unknown person. The person who got the fansign's mates commented on the photo saying the girl I was going out with did that fansign and if it was her in the photo it would mean she had sent it whilst we were going out. And apparently now after 2 days of breaking up with my girlfriend rumours are going round that they like eachother and I believe it because their names are in both of their bbm status, so I think we broke up so she could get with another guy and used the excuse of having loads of thing going on in her life at the moment to breakup with me. and I also think whilst we were going out she did a fansign to this apparent ' friend' who I'm not close to anymore and my ex said she still wants to be best friends as she thinks we're better off being best friends, what do I do? Sorry if it is too complicated because its a really complicated story

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