What's the Name of That Book??? discussion

Princess from different world somehow ends up in present day Earth in a Narnia-like way (i think there were a lot of trees or branches). Present day teenage boy meets her and he gets her some clothes. He takes care of her yet he sometimes gets annoued. Oneday they go to a party (or maybe it was just her and he followed her) and after seeing all the attention she's getting from other guys he gets jealous.
I read this in 2015.

A Kiss in Time?

Yes!!!!!!!!!!!! Thank you so much!!!!!!!!

Glad to help, it's one of my most favorite books! I'd know it anywhere.