Your husband sounds very unhappy in the marriage - and I'm sure you are unhappy too. DID you pressure him to marry you? Or did he come up with the idea of marriage without any prompting from you?
Did you live with each other before you were married? If so, did living together work out OK for you? You say that you're from different countries - how long did the two of you spend together, face to face before getting married? What was this time together like?
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.