I suspect you will, in time, be healthier without him.
It could be important to explore the reason you say you do not want children.
Trying one approach after another rarely works because each makes the last seem insincere, and desperately about you and not about caring for the other person.
Being alone can be scary at first, but you CAN make a life, and friends, for yourself if you give yourself time, kindness, and seek support from a healthy source.
((((((((((((((((hugs)))))))))))))))))))))