bestfriend or girlfriend

[Raidenator]

I'm not gonna tell you to date around, that's up to you.

You gotta talk to your ex/girlfriend whatever she is. Find out what it is that she REALLY wants. Maybe this whole break thing is actually just a reason to break up. In which case, you should obviously go for the other girl.

Anyway, talk to your ex then decide. If your ex wants to stay together then do whatever you want. It's a choice you'll have to make.