I really miss my ex husband and wish we were together, we don't speak anymore. how can we at least talk again?

Can you contact him?: I think, if no restrictions are imposed, you should consider discussing it with him as your best option. It is a very interesting topic for psychotherapy, which would help you clarify what you really want. Who knows ! best of luck to you.

It sounds like: You are lonely. You may consider therapy. Maybe it's for the best if you stay apart. You may consider, if you were at fault, you could write a letter and make amends. Leave it up to him. It may not be good for him to reconnect. Good luck.

It depends.: Think first about whatever caused your break-up before you make an effort to contact him. It also depends on whether he has a significant someone or is married, at which point, it maybe a little bit more complicated. If you have children together, it maybe a point of interest for both of you to continue communicating.