katlin started dating Dylans best friend shortly after they broke up so I don't see why she would have any reason to be mad that Dylan is seeing other girls.
obviously you do not understand the concept of 'minding your own business' the whole thing wasnt even about him dating another girl. and katlin is allowed to date who she wants, dylan is. can u plase do me a favor and dont ask such stupid crap that you know nothing about and as a matter a fact i dont know much about it either. bye bye