If a boy get jealous of you talking to another boy does that mean he likes you?

Are you saying that the other boy likes you? If he does, that probably means he's jealous, or that he's just curious. Either way, you can try to find out if that 'other' boy likes you as well. And you will probably have to pick from both of them or neither. :(

Ive done that to a girl before, and yes, i was slightly Jealous. I mainly did it though because I myself was thinking of asking her out, and then when i found out she got a boyfriend, I got jealous of it.