I need some more advice

Okay so the gist of what’s happening is that my boyfriend out of no where is now super supportive of me. Which is amazing obviously lol but the problem is that I’m an overthinker and I’ve honestly probably never been in a healthy relationship so all this extra kindness feels like it’s mixed with some ulterior motivation.

Also!! In my relationship with him we’ve kinda never allowed each other to stay out late with friends. Both of us being homebodies really kept us at home. Now, he’s being super nice and never sleeps at home. He’s been home one night the past 4 days. He’s cheated on me before so I’m sure y’all can imagine the type of overthinking is happening in my head. Please someone else tell me to calm the fuck down before I have a massive panic attack.