Do I ask forgiveness for bad behavior in Jr High 15 years ago?

Recently I re-connected with a Jr High friend on Facebook. We are both married moms now, living in different states. We comment on each others status updates occasionally, and that's about it, tidbits of advice, sharing funny things about kids, etc. Since we've re-connected, I'm remembering my bad behavior toward her. I would be friendly and snobby in turns, depending on if I 'needed' someone to hang out with, or if I was with 'cool' people, ditching her, typical Jr High crap. I do feel crummy about treating her like that, but does bringing up old crud for getting forgiveness just make her uncomfortable needlessly? Would you want someone to ask for forgiveness?