Why did he all of a sudden talk to me?

Maybe hes kind of shy too and thought it would be less pressure and easier to talk to you with other people around. Cause im just like you really shy around guys and maybe some other people so if i like someone and really want to talk to them id like bring my best frand with me so she can join in the conversation and make it easier but maybe since he DONT like your frand he thought it would be easier, sorry if i confused you but do you understand?