I'm sorry you're lonely, I am too. I've been desperate and contacted toxic people too. Personally I don't think it's a good idea and better to branch out on places like this because it's anonymous and a caring, safe, judgemental free place, so we all understand one another since we're dealing with the same or similar things.
I think it's a bad idea for you to get back in contact with toxic people. They're obviously toxic for a reason and if they upset you, they have no place in your life. You're better off without them. Trust me I've been there, it's not worth it, you'll only get hurt again.