I am a mess, I need advice please 😭

Okay, so I met this guy who is really sweet and nice and I really like him. After our first date we had sex, but after that he told me that we should take things slow and stuff. Since that day we haven't even kissed. We had some awkward days after we had the conversation though. But after that he introduced me to his family. So I'm extremely confused. (I have anxiety, so the overthinking doesn't help).

Also, here comes the worst part. Yesterday I went to a party and had a couple of drinks, and ended up making out with another guy. We just kissed, and I felt so guilty I told the guy to stop.

I just don't know what to do. I really like this guy and I don't wanna mess it up with him. But I feel like I should be honest and tell him. Idk what to do. We aren't officially dating because of the taking-it-slow situation but I still feel terrible.

Should I tell him now or when things get serious? Or should I just not tell him at all?

Also, I'm trying to figure him out. Does he really want something with me? Because you don't introduce any girl to your family, right?