I just went through and caught up on all the pages. Regarding Parth's IV, I don't think anything he said was wrong. In my close group of friends, they always make fun of each other and me. Initially, I used to get very offended. I still sometimes do get offended. But the fact of the matter is that just because I get offended does not mean that they are no longer my closest friends or I stay angry with them.
Similarly with Parth and Erica, they are both mature adults. Yes, Erica may get offended, but that does not mean Erica is being mistreated by Parth. In friendships, people do tease each other and there's nothing wrong in that. Moreover, I think Erica is smart enough to know how to handle her relationships and she won't stay if she was being "mistreated".