The fact that your ex told you to simply "abort it" sounds like he doesn't give much of a damn about life, especially the new life that he has created.
I dunno, girl. I can only really blame you and your **** of an ex boyfriend for getting yourself into this situation, but do not worry your little head, sweetheart, there are ways to get out of this situation. But I ain't aware of any atm.
Its best to talk to a doctor or someone and try and get their advice on what to do, rather than the advice of people on the internet.
Your parents do not need to find out if you do not want them to; ask the docter or whoeever to keep the information confidental.
Only resort to abortion if there are no other options (i.e. as a last resort, don't use it as an easy way out, because it isn't fair on the child, whether its born or not).