Caught Girlfriend Cheating. Should I breakup with her?

you should probably dump her, there is NO excuse for cheating, NONE, she obviously knows how much she means to you and still done it so.. I would dump any girl if she cheated, she is not my wife as someone else said, on the other hand though if you do love her that much you could give her another chance, but as someone else said she might and probably will do it again, your choice mate, personally, and I think most guys would get her to f*ck ! good luck mate :)