Jelious Boyfriend

So i dated this guys years ago and after we broke up we were still friends. it was an early childish kinda relationship. but we wanted to be friends afterward. so skip three years and im still friends with him and now i have a boyfriend who i adore and love to the moon and back. we are trying to have a baby something that before him i never wanted. but he has an issue with me being friends with my ex. he says he trusts me but doesn't trust my ex. i told him that he didn't need to trust my ex only me to set him straight if he tires anything, and he hasn't not in the three years we have been friends. but it still an issue with my boyfriend, that's the only thing we ever argue about. what do i do?

UPDATE; so didn't take long and i guess i should have done it to begin with but my ex is out of my life. honestly ot hurt he cried and i started to tear up and when i told my boy friend i almost started crying again. we had been friends for years long before my bf came in to the picture. but i love my bf more than anything. i told my bf i was sorry that i didmt drop my friend im the begining amd im sorry that i hurt him. he e me and told me he was sorry i lost a good friend.

UPDATE: My ex friend is in the hospital right now due to trying to kill himself, i feel so guilty this is all my fault. MY SO feels the worst he kept apologizing to both of us and if my friend (Yes FRIEND) makes it i want to stay his friend.