What should I do?

So in March my ex and I started talking again, we were together in 2017 and we dated for 10 months. After we broke up we always found our way back to each other but never dated again because I was scared. So back in March I started talking to my current boyfriend because I was heart broken over another guy, I know it was dumb. But in the beginning my ex started talking to me again and I said that I was talking to my current boyfriend so my ex said that it’s fine all he wants is to see me happy and that same day he got a new girlfriend. I was happy but after a few months I started to realize that this isn’t the relationship that I want and now I’m missing my ex more then ever and it’s really hard not to text him. I don’t wanna hurt my current boyfriend but I also don’t wanna stay in the relationship. I should of chosen my ex and I don’t know what to do. It’s too late to get him back now and I’m upset that I chose the wrong guy again. Any advice helps!