Is Blocking my Ex my Last Resort

Hi just need some advice on how I should be taking a situation with my ex and whether or not blocking him is the right move. It has been a very rough few months and I don’t know how to deal with this. I don’t want to feel this way anymore.
I broke up with him in March 2020. We were together for 3 years and since the breakup we have spoken on a weekly basis and saw each other briefly a few times. Our conversations have been a roller coaster of emotions. He has stuff in my house he hasn’t picked up for several months.
The last time I actually saw him was June, until this weekend. We met up on Sunday, he called me and asked me to meet up. We talked about some issues he was having with his family and he appeared to be ok but I could sense he had been drinking the night before. We hung out for a few hours, talked and we did become intimate which we both wanted (it felt like there had never been a gap in us seeing each other). He told me he loved me and that he missed me and after awhile I dropped him off at a bar since he was meeting a friend. He gave me the impression he wanted me to come back for him but he never called and I never called either. The way we were that day was how we were during our relationship laughing but also serious at times. I didn’t bring “us” up in future sense, but we did bring up on how we were so in love before. He asked me several times had I been with anyone since him and I said no (that was a lie I didn’t feel like he needed to know)and he said he hasn’t been with anyone.

One day later we had the following text message:
Him: You didn’t call to even see what happened. My god I need to never drink again. I’m sorry you had me going crazy. I don’t deserve you.
Me: I don’t even know what I’m supposed to do anymore. I was worried about you.
Him: I don’t either.
A few hours later:
Him: I’m sorry this s**t I can’t take anymore. I love you.
Me: I know I am no longer a part of your life and I understand. I will always love you.
Him: Oh god (my name) Just please your an amazing person an angel to me.
Me: I don’t know how you feel anymore. It hurts so much. Just tell me you never want to speak or see me again (his name).
Him: I can’t.
Me: Ok I will do it then. I love you please take care of yourself.

I took his initial text as he meant dealing with me, so my reaction was let’s cut contact if you can’t deal with me. I have told him in the past that we need to move on, yet he continues to reach out not sure if this time will be different.
I am struggling with his emotional instability, he was never like this before. I was never confused on his feelings we lived together and he was kind, loving and supportive.
He kept saying that he doesn’t deserve me and that he can’t believe after all these years he still feels this way that it is scary. I am feeling lost, its as if he doesn’t want to let go but also doesn’t want to be in.
I know for many this looks simple he is “emotionally unstable” and doesn’t know what he wants and is dragging me down. I want to figure out how do I handle this with integrity. Given he does have a lot of things in my house but also show him he can’t continue to play with my emotions. I was considering blocking him for the next few months. Any advice?
Sorry this thread should have been under “Breakup”.