I feel jealous (I think that's what it is) when my boyfriend plays female characters on WoW.

I don't know how to explain it or why but it bothers me but I hate when my boyfriend plays female characters on WoW. I don't know if it's because most other guys who do it give playing female characters a bad name, because they usually play them so they can wear skimpy armor and run around looking like a play toy, or if it's the fact I'm jealous and feel like she's almost another woman who looks completely different then me, like his fantasy girl?

I know it's ridiculous and stupid, It's just I love playing WoW with him but it's hard for me to get over this small, stupid thing.