Jane, I can relate.  I did this once also and it was only because I was  drunk.  Move on, pray about it and pay better attention to how much you are drinking.  Don’t hate yourself; just don’t do it again and don’t get drunk like that.   And if the person is a temptation to you, stay away from him also.  Don’t take the guilt to the extreme; cut yourself a break.  It was a mistake and you don’t have to make the mistake again.  Good luck!  I’ll offer up a prayer.