Dating life

I recently got out of a relationship about 2 weeks ago. I wasn't that hurt by it. I've been fooling around on tinder after the whole thing and conversed with some guys. But one guy in particular that I had been talking to pre relationship popped back into my life and I ended up hanging out with him a few times which led to sex. I think he's cool but part of me feels like this might not lead to anything (always overthinking lol). I have a tendency to fall for guys super quick and get into my feelings. If I've had sex w this guy and were kind of talking is it still okay to explore my options and hang out with other guys? My thing is I've only ever had sex with guys I've been in relationships with.. All of 3. How do you guys go about dating or meeting up with guys?