I think Nick is enjoying all the extra attention he is getting, if you love Nick I would not dump him straight away, it could be just small hiccup in your relationship, but you need to tell him straight, this kind of stuff won't wear with you, and HE needs to put a stop to it, no-one else, if he loves you and cares for you and realises his relationship with you is on the line, he will do the right thing.

If he is not prepared to , then yes sweetie I would give him his marching orders, plenty more fish in the sea and you are a very pretty young lady, who will have no problem finding another boyfriend.

I think it all depends how serious you two are about each other, as to whether it is worth working this out or not, whatever you decide , good luck dear.

As for the other girl, she is a waste of space, she knows he has a girlfriend and she should behave herself, but I guess she is after him, it sure sounds like it.