How do I disolve my marriage to a man who is already married when i got married out of state?

You cannot be legally married to a person who is not free to legally marry you. Being still legally married to someone else would disqualify a person from marrying you.

If the person was still married to someone else at the time of your purported marriage, you likely do not have a valid marriage.

If you want to be certain of the status of your marriage, you can file a petition to determine the validity of your marriage.

You should review your specific facts with your attorney to see what your legal options may be.