My Ex started talking to me again and idk what to do about it! Help!

Hey ladies, Sorry if this is long, I just really need some help!!

So I had a horrible break up with my ex about 2 months ago. We had been together for 3 years but we broke up a couple of times in between because we BOTH had problems with the relationship and we both had a hard time listening to what each other needed. It finally ended when he dumped me for another girl that he only just met like a week before. I was a wreck and I couldnt even function for weeks.

Then I realized that being single wasnt the worst thing ever. I have been talking to a few guys and even had a fwb thing going for a little bit. All the guys were not seriously interested in me however so it somewhat frustrated me. Sure I wanted to be single and have fun, but whats the point of talking to guys if its not ever going to go somewhere eventually, you know?

I could not ever really stop thinking about my ex throughout all of this. Little things here and there would remind me of him all the time. He texted me the other day about something casual. I was shocked to hear from him because I was planning on going “no contact” for at least 60 days, but he texted me at about 40 days. I responded and we got to talking. He called me later and we caught up with what has been going on in our lives. We ended up hanging out the other day and it went well considering all the past drama.

I told him that I didnt want to have sex with him because I’ve decided that I dont want to have sex with someone unless I’m officially dating them. He respected that but still tried to turn me on to get me to change my mind. Unfortunately, like a day later i gave in since we were best friends and we have so much history with each other. But then I told him that we are definitely not doing that again unless we are dating when/if that even happens.

I told him that I don’t even really want to hang out with him if he’s still with that other girl. He told me that he’s definitely not dating her and that he’s made that clear to her. He said that they are “just having fun” right now and he’s actually thinking about just ending their little thing and being single for a while. I hope he’s not playing me! But she did seem like a stereotypical rebound to me considering he knew her for a week before he decided to leave me for her. IDK!

He told me that he’s glad that we are on good terms again but that he doesnt want to rush into anything by getting back together. I do sort of agree with him because it would be foolish to just jump into things again with him and expect everything to be okay. But at the same time, I dont want to get hurt again in case he just decides to randomly leave me again and I have no assurance that he wont just do that to me again so it scares me.

He invited me to go on a day trip with him and some of our mutual friends. I thought this seemed like a good step because he’s not trying to hide the fact that he’s hanging out with me from our friends (the same people are acquaitances with the other girl that he’s been “hanging out with” but they know me better).

But idk the whole thing makes me so nervous! I don’t want to ruin anything, I don’t want to get played, and I don’t even know if talking to him/hanging out with him again was a good idea!! any tips ladies??