positive but difficult situation

Christine
Omg! Just got a positive test! I'm 33 years old been trying for over a year, however I broke up with my boyfriend cuz he was being a dick and I started seeing this great guy. I know it's not this guys child cuz I'm about 6 weeks along and I've been with this guy for a month and I used protection. So now I have to tell him and break up with him but I'm not telling my Ex either that it's his! He doesn't deserve it, so what the hell should I do?