1) Friend with benefits?? If you gave a wit about the other guy you wouldn't be "medding" with anyone else. So you've proven that the first guy mentioned in your situation is just a sistraction.
2) You don't even know the guy who proposed so he's got some interesting issues that hopefully you will never know about because he's never been around l;ong enopugh for you to get to know him...that is until there was this "friend with benefits" guy in the picture.
30 You are too immature to be seeing either of them.