I need to vent

So tomorrow is my birthday and my fiancé and a few of our friends are suppose to go out tonight. Well this morning my fiancé went to work and was completely nice. I go home for awhile and he texts me saying he's home. So I was reminding him that were suppose to go out for my bday and then he says he don't know if he wants to go. Then he starts flipping out on me and yelling and now I'm upset and hurt. I mean I didn't even do anything to deserve him yelling at me. We've been together for 5 years. But it just makes me mad that he's not even wanting to go out for my bday. So I'm going to go out with out him. So I guess what I'm asking is that even though he made me feel like crap and I keep crying. Should I go out without him and have a good time even though I feel like crap.