This ever happened to you? Had a dream about a girl and now I have a crush.?

I've known this girl for about 6-7 months, we work together. She is 19 i'm 24. She's a little feisty thing who really is not my type (plus she can be a little immature at times) but still very cute. We do flirt back and forth but I just considered her a friend and fellow employee. The other night I had nice a dream about her. not quite one of "those" dreams but it could have gone that way if my alarm hadn't gone off. Now I kinda have a crush on her. I feel so stupid about this because before there really wasn't anything here, but now i keep finding myself thinking about her (obviously) and trying not to blush when we talk. Plus i'm the older one.I'm not a freaking teenager this shouldn't be happening anymore arghhhh!!! It is driving me nuts. Why me?!!!!