Need some advice please ‼️

Been married for only 5 months and he is by far the worst man I have encountered he did a complete 180 once he saw he could not treat me horribly or control me. we are separated We have apartment together and it’s under my name but he is on the lease and will not leave. I want him to leave this is miserable being in a apartment with a man/child he does things to get under my skin I told him it is not a good idea to bring his children into a situation like this for the summer he said he does not care about what I feel and brought them anyways even though I’m now required to pay half of everything. He is blocked and he has me blocked so now how is his portion of the rent going to get paid I absolutely don’t want anything to do with this man but I can’t break this lease and have that on my record where I can’t get another apartment he so bitter and evil he could drag me along and not pay his portion not only that I just want him away from me! I really dont know what to do…