There is this cute guy in my class but he has a girlfriend. I think he isn't happy with the relationship but i don't want to break them up. He texted me i love you and didn't say "wrong number" or anything showing he didn't mean to send it. Should i flirt with him back or should i let him and his girlfriend do their thing?
Approach him in a non flirty way. If he is unhappy for just a few days or weeks, which can be normal in a relationship that means he isn't trustworthy. Who says he won't do the same to you if you have something with him? Also, him texting you i love you out of the blue isn't really normal stuff... Ask around as well and see what other people say, both guys and girls, about him