Can’t move on to a new guy....

I was talking to this dude for 5-6 months. We’d always hang out and do couple things together. We were something but never put a label on it quite yet. We stopped talking almost 2 months ago. A month ago I started talking to someone and I really like him, it’s just that it’s completely different than the first guy! I would always hang out with the first guy when I wasn’t working, we’d go party and have fun all weekend long. This new one is more mature. He has a kid and has that obligation. We’ve only hung out a few times but he always makes sure I’m okay, which the other didn’t do. He just seems way more into me even though we’ve only been talking for a little over a month.

I follow some of the first guy’s friends and they all went out today. I heard that he was talking to a new girl through a mutual friend and it made me a little sad. I saw him in a story next to some girl I didn’t recognize and all the emotions are flooding back. Idk if it is that girl he’s been talking to, but seeing it hurts. I shouldn’t and don’t want to feel hurt because I know it’s over and I have something good. But it’s just a weird feeling. Idk why I’m so attracted to that playboy/party boy guy and not this more mature guy. How do I deal with this??? I just don’t know what to do...saying to just move on is so easy but actually doing it isn’t