Guys please help?

He sounds like he was using you. It's like when you go on a first date and say if it's not going well I'll give you a sign and then you call and say someones been in a horrible traffic accident. 

I know it's hard but you need to move on and completely remove him from your life. He is your ex for a reason. Don't let him use you for sex until the next person comes along. Be strong and concentrate on being you.

How do you know it was made up story?  Do you have proof?

Let him go. If he's just there for sex, you'll know pretty quick. Is he asking you out, making plans to be together? No? He's just after sex.

Sex might be fun obviously, as are drink and drugs no doubt, but outside of a strong and well established relationship it can turn out to be disastrous. Not only can pregnancy and STDs result, but sexual intercourse can often be emotionally bonding (especially if regular or frequent), and when the strong friendship, mutual values and interests etc. are not in place this can prove emotionally confusing. Just read some of the questions here, or watch some of the daytime t.v. shows with very unhappy people who have had sex too soon and/or with the wrong person. It can also cost a girl her self respect and the respect of others (including future boyfriends).

Good Luck!