Need to get it out there

Not sure this is the right place to put this but here goes:

I need to end a relationship but have tried hard to numerous times and not been strong enough. It is pretty toxic and unhealthy. There are a lot of issues including them trying to get me to do things I don't feel comfortable with.

The issue is that despite everything I still love them. Despite them treating me badly and feeling really down myself about this situation I have tried to cut them off but in the end they talk me round staying and as hard as I try i don't have the strength to keep away. In spite of my own better judgement. I am not even convinced they love me anymore but whenever I try to tell them we need a break/space they just hold tighter.

What adds to the complications is that they left a previous relationship to be with me. So although we are not happy, disappointed and I don't think they love me it is as if we are just stuck together. They've told me they want a life with me. But I just don't think that they are good for me.

I just want to know if anyone has any thoughts/suggestions on what I should do?

Thanks