Baby’s Father.

I am 11 weeks tomorrow. I have had an on again off again relationship with my baby’s father who I truly love and am still getting over, every time we break up he completely spirals down and has done drugs and partied. And he still hangs out with those people. He wants to see my baby half the time, I am terrified to let him be alone with my baby due to the simple fact that I honestly can’t trust him. I don’t know what to do. Opinions are appreciated.