From what I understand Corey and Jeremy have known each other a long time. They are actually friends and getting along despite the fact that Leah and Corey haven't even been divorced a year yet. Corey seems like he is finally okay with Leah and her fiance Jeremy.
I don't know a lot about Jeremy but he seems like a nice guy. Corey and Jeremy were spotted smiling and hanging out together in NYC while the cast was filming the Teen Mom 2 Season 3 Reunion Special.