Should I let my boyfriend go to prom with another girl because I can't go with him?

Anonymous
Me and my boyfriend have been dating for 6 months now. He's two years younger than me and I can't go to prom with him as I've left high school. He's asked one of his friends that is a girl to go as a mate date. The girl he asked is single and he felt bad as she would be going by herself. To be fair I do see the point of them both going together and why not if they are friends. But.. I get upset that they will act like a couple eg photos and dancing together. I feel that what's the point in going out with me. My boyfriend can get very jealous and if it was the other way round my boyfriend won't have let me go to prom with another guy. Me on the other hand I won't consider myself as the jealous type and like to think about both sides of the argument. It's the 21st century and you don't have to go to prom with a date do you? So my question is should I tell my boyfriend that I feel uncomfortable that he is going to prom with someone else or should I just leave it?
Should I let my boyfriend go to prom with another girl because I can't go with him?
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