What to do, what to do ? boy troubles.?

well first of all the guy with the girlfriend is off limits. & if he's willing to cheat on one girl what makes you think he won't cheat on you ? and second of all the other is he nice to you when hes around people or is he mean ? cause if hes mean to you in public then he don't really like you. or maybe your just ugly (: your welcome for the advice.