If you have a girlfriend and a boyfriend, then you are cheating on both of them.
maybe, maybe not.If he spends more time with the girl he is cheating on.
You can tell for sure that your girlfriend is cheating, by catching her on the act with her lover.
he is totally cheating.
I don't dream about your girlfriend
Speak to her about the matter or seek advice
then he must be cheating on you if he has a girlfriend? i mean if he likes you and has a gf then he must be cheating and wanting you?
Follow her
yes, it is
stalk her
no
she is cheating on you.