Too bad about your friends. Maybe try to make some new friends?

As for the pains you are feeling, they are pretty typical of breakups.

There are two roads to go down:

1. Continue indefinitely playing the relationship game with her. Just know, that during breakups, it really does become a game. An emotional roller coaster. That could end in a really great relationship in a few months, or it could fall apart even worse.

2. Walk away from ALL the games. Which means letting go of the relationship and any resentment or jealousy that you may encounter for the next few months. This in itself may be what the relationship needed in the first place. So you will be a better person having gone through this, and more prepared to have a good functional relationship with the next girl.

In forging steel, the iron workers torture the steel by fire and hammer it. And cool it. Repeat. Every girlfriend and breakup is another cycle, making you a stronger more emotionally stable person for the next girl. Just don't forget to grow as a person from the experience!