What would you do if your (teenage) girlfriend was up all night most nights texting another guy and not you? Just wondering.
They're probably just friends. Most girls have tons of guy-friends. Really. Think nothing of it. And if you text her, she'll text you, too. Girls really have problems with sending the first text. It's weird. Anyways, just send her the first text.
There either close friends or she's into him. Before you assume of something though, ask her what's up.
that she has more interest in the other guy instead of you.
Talk to her about it and if she liked someone else break up with her that's probably what you should do just my opinion