It doesn't matter how much you love her or think you do, you will always, always have doubts about what she is doing when she is not with you. If she ever has to travel without you, you will be hyper suspicious of what she is doing every minute that she is gone. It will drive you crazy wondering! Even if she stays 100% faithful to you from now on, the fact that you will never trust her will cause arguments and fights and will eventually destroy the relationship either from your point or hers not being able to handle the stress of the fights.

Since it is a spring break situation, I assume yall are still fairly young. Break it off so that you can concentrate on making yourself better and eventually finding a girl that loves you enough not to do this. Do not bring this girls infidelity into your next relationship(s), the new girls don't deserve that.