If you found out that your boyfriend got another girl pregnant before you started dating him, wat wld u do?

Me and my b/f r totally crazy about eachother. We been together for about 1 1/2 months...we are getting married next year, and we are soooo in love!!! but recently i found out that another girl might be about 3 months pregnant with his child and i found out about it before he did...the girl that is pregnant told me first!!! i just dont know wat to do cause i love him sooo much...when he found out he cried....HELP!!!