I think it depends on the nature of your relationship with your boyfriend. As someone who has been on both sides of the fence here, it can be a very hurtful thing to do to someone. I wonder how you would feel if your boyfriend cheated on you? If it wouldn't bother you, then I would re-think my relationship with him if I were you. If you have that sort of relationship than maybe it's not that big of a deal. But in my opinion, if you are committed to someone married or not, then you should consider that commitment before anything else. I think we would all expect that courtesy in return.
cArolyn
cArolyn