Listen to the Bunny. I'd also ask you to remember why you and your ex broke up. We do tend to remember the good times, especially if he's being attentative now while your present BF seems to be taking you for granted.
Mind you, being part of a couple doesn't mean being joined at the hip. It's good that your BF spends time with his friends and I hope you're spending time with yours. We all need our friends for the good ones will be around a lot longer than any BF!
We don't have to be part of a couple to be complete. Step back, be friends with both of them, if possible, and then make friends with yourself.
Good luck!