Help! Losing my husband and don't know what to do

I need advice. I have been separated from my husband for almost a month now and it's all my fault. Back in June he started making music and constantly going out to strip clubs, the ine place i don't agree with. I decided to start hanging out more with my girlfriends to pass the time when I'm alone. I ran into an old male friend one fay and we kept in contact after that anf hung out a few times. There was this one night that we ended up by ourselves and ended up sleeping together. About a month later, I ended up finding out that he gave me chlamydia and unfortunately I had passed it on to my husband. Of course he had to find out in order to get treatment. Now months later, my husband decided he wants a break and I feel like I'm losing him for good. I hurt and break down multiple times a day.