Pfft well if you're asking people on the Internet whether you should stay with her or not, than you obviously shouldn't. If you really wanted to be her boyfriend again, you would do it. No hesitation. Don't start a relationship with half assed feelings. Like what
>>4 said, there are plenty of fish in the pond. Trying to get your girlfriend back is like... having a fish eat half your bait and trying to catch it again with the other half. If that makes sense. Lol if you want to, then go for it. It's your choice after all.