Don’t let the pressure of it being Valentine’s Day make you jump and do something you will regret later. You should only be ready to break up with someone when you feel you are ready. Don’t let guilt prevent you from waiting, if you want to really break up though, don’t plan a romantic Valentine’s Day, knowing you are about to end your relationship soon after.
Be honest with yourself and your feelings for your boyfriend. Don’t act on anything until you are ready. If you sincerely feel the relationship can be saved, and you still love him, go for it. Don’t end it.