B.C.
You recognized you made a mistake. You asked for advice. Good start.
Everybody says things they regret. If you love him, apologize and apologize. If you love him and he loves you make a commitment. The commitment is called marriage. I looked forward to getting married, but it was a tremendous burden I took on when I asked my wife to marry me, because I knew it wasn't going to be only me I had to worry about. I actually felt as though a weight had been laid across my shoulders. It is a real life changer, or at least it was for me. Marriage is signifies a genuine, real-life commitment. Part of earning the title "Dad" also means earning the title "husband".
You say he earned the title, "Dad". In a fit of anger you took that away from him. That's a tremendous cut and right to the heart.
You didn't say what the "major issues" were that you and your boyfriend were arguing about so those cannot be addressed. Go to marriage counseling and get some advice. If he won't go, go by yourself.
Remember, no sex without the commitment of marriage. Good Luck to you and yours.