Can I get some advice from people I don't know?

[gphiangel624]

So, talking to some of my friends, I've realized that a lot of them do not understand my situation in the least, and aren't really willing to listen because we've all got our own problems right now (it's like the quarter for break ups and skeletons coming out of the closet here at UCR). So I'm asking for advice from the wise GC community...

My boyfriend of nearly 2 years (also my best friend) broke up with my in February, completely out of the blue (he "wanted to see other people and couldn't make a commitment anymore"), and I'm starting to really get over it. We've had some trouble trying to remain friends because we always said we'd still be friends, even if it's just acquaintances who speak once a year. Well, we got to the point where we feel comfortable hanging out together, and I feel comfortable hanging out with his friends and bros (who were my friends before we started dating and have still remained friends). He wants to start having a friends with benefits situation, and I'm not sure if I want that because of the second part of this situation:

The ex mentioned above (we'll call him Alex for lack of better pseudonym) knows that I hang out with some of his bros on a regular basis, because we always have, even if Alex wasn't around. That's just how our friendship is. Well, these bros happen to be Alex's little bros and grandlittle bro, and they all live together with the grandlittle's friend from high school, "Mark." (They live about a mile from me, so it's convenient to hang out). I've gone out with these guys a few times in last week or two, and they finally introduced me to Mark, who I knew of as a roomate, but never met. Well, Mark and I exchanged numbers, we went to a club last week with the rest of the roomies and some of my friends/sisters, and we hooked up that night at his place (no sex, I'm a good girl). His roommates knew I spent the night there, on the couch in the living room with him, but when they asked Mark what happened, he kept his mouth shut and just smiled (which I totally respect), so they asked me instead. Mark and I hooked up again last night, which they also have no idea about, at least yet.

Here's the thing: The guys know I like Mark, don't want a relationship, but want to get to hang out with him more, etc. They've told me he doesn't want a relationship either. Mark is not a bro of the fraternity, doesn't even go to our school, but is transferring in a year or so, and will probably become a bro because he knows them all anyways. His roommates have expressed a number of times to me that Alex was in the wrong for breaking up with me, that he wasn't worth me, and that I should keep up something with Mark because they say they think he's a better guy for me and won't hurt me like Alex did. I understand that some may think this is being disloyal to Alex as a bro, esp. as their (grand)big bro, but I like Mark and wouldn't mind getting to know him a lot better, and seeing if something happens from it. Is it going to cause issues with Mark's roommates if something did come of it, issues between them and Alex, or possibly Mark and Alex given that Mark may rush? Should I pursue this, or show more respect for Alex as a friend? Should I believe the roommates when they say that I deserve better than Alex, and that Mark is MUCH better? I'm really confused here and just need to know what is thought of the situation...

PS: sorry this is so long... i need to vent it all...