ashton
when ash gets jelous he would always give the guy talking to you the death stare and then walk up to you and kiss you hard.
luke
luke would be awkward for a while, he would just stand in a corner and look at the guy but he would finally walk up to you and pull you away
Michael
Michael would tell the guys straight that you were his and to leave you alone. If the guy didnt leave michael would start kissing you neck
Calum
Calum would stay by your side gripping into your waist tightly. Every now and then he would make some sassy comment to the guy. He would be quite pissed after the guy left.