One is marriage material, one is for fun...not sure which girl to go after?

[Tucker]

Torn between two girls right now and can't decide. 27 yr old blonde and 21 yr old brunette. I'm 26. Blonde and I have history. Both girls are hot, the brunette has an average face and a very thin body but has better abs than the blonde, but when I go out with the blonde, she is so beautiful and stylish she literally turns heads. The blonde is more stable (emotionally and financially) and is very sweet to me... gives me massages after work, gets me my favorite treats when she's at the store, and is fun to be around. The brunette is more like me in that she likes to party and have fun, but she is also kind of snobby and selfish. The brunette and I have a lot of the same friends, but my friends like the blonde better. The blonde is more easygoing and always happy, the brunette is more feisty.

I'm not sure I want to be serious now, but I don't want to lose the blonde forever, and I will if I keep playing around. I don't know what to do.
oops thought i put this in the dating section...