I 24M miss my 22F Ex and Am Thinking of Reaching Out to Her. Good or Bad Idea?

tl;dr : Me and my ex broke up about a year and a half ago. Dated for a little over a year. Have been off and on since high school. I miss her and there were no major problems (nobody did anything wrong, just got too comfortable and it got stale? grew apart? idk the exact explanation. Now and since I miss her. Everything always felt right with her, even now I don't think there's anything that I can say is really a problem with her or with us. I don't know if reaching out is a good idea though. I know you can't take it back and I don't want to cause her trouble.

So I have now been single since me and her split up. We started out as a hook up deal when I was in high school. We dated briefly in that time but I left in a bad way that caused her some pain. I realized I didn't want to be in a relationship, but I had recently taken her virginity so it was bad on my part.

Skip forward a few years, we had hooked up a time or two in between, but rarely actually talked. Then a couple of years ago we started talking again, as far as either of us knew just for sex like usual. Well she played hard to get to keep from wasting her own time, fair. I ended up catching feelings and just enjoying the talking. Well we eventually hook up and end up admitting we both like one another. From then on we eventually got to the point of dating.

She was and is the first girl I was proud to have around my friends. I didn't care what they thought because I knew she was amazing. Part of this I am sure is because I matured into realizing it was silly to be self conscious over that anyways. We were supportive of one another, extremely open and good at communication our issues and getting passed them. At least until the end. I love her personality and I think she did mine. She's beautiful and obviously considering our past the sexual chemistry was phenomenal.

I want to reach out to her, but we tried to be friends not long after and I didn't handle it the best. I still wanted my girlfriend, and obviously there is things and expectations that wouldn't align with that. I think I have learned from my time with her as I have with every relationship so I know it could be better from me at least.

I have tried dating and dating apps, but I realized the only thing that really excites me are people that are like her in looks, style, and personality.

Help me out please.