Did I make a mistake letting my ex back into my life?

My ex is literally torturing me. I invited him over yesterday and I thought everything would be OK after he was being so sweet with me like we were in a six year relationship and I love him so much but I think that he’s over it and just uses me for his benefit he tells me that he’s too busy to talk to me and that I drained him because I’m always cry, but I can’t stop crying. I feel so betrayed. He literally acts like I’m a burden that comes over when it’s beneficial and then acts like I don’t. Exist.
Did I make a mistake letting my ex back into my life?
Post Opinion