Hey Kat19, your the only one that knows for sure what your emotions are , and we don't know your history with this person, but personaly, that was one of the most selfish displays I have ever heard about, I don't know if there were any other insensitive acts demonstrated by your boyfriend, but I'm sure this one was defanitly an eye opener. I'm sure if you think back you will probably find other acts of selfishness. Who knows whats to come in the future with this person. I'm not about to tell you to dump him or give him another chance. Your going to have to make a decision on whether or not this is the type of person you want to spend your life with. What other things has he done to piss you off. Will you be able to over look what he did. A big part of being in a relationship is being there for your partner when things are good and when things are bad, he seems to have failed this test miserably. Only you know the answers to that, and only you know what decision you should make.
Good luck.