With his ex

First of all, if he was gonna talk to his ex he should have told you FIRST instead of making him worry. I say forget what these girls are saying about being patient. You should be pissed. Don't talk to him until he calls you to explain. Then explain to him that you would have never put him in the position that he put you in. If you trust him and he has a good reason why they talked, tell him you trust him and ask him not to ever do it again. If he doesn't have a good reason or you don't trust him, forget him.

Next time he calls you for sex, tell him you can't, because you're with YOUR ex.

Drop him don't stress yourself you can do better. It's hard believe me I wish I used my own advice.

I wouldn't stay with him for the simple fact that he could be using you. If you don't hear from him in a few days. Question him about his ex and find out what they talk about. that's what I would do.

I would definitely say to move on. Anyone you have sex with right away will never have much trust in you through a relationship and will not take you seriously. You will have to let this one go after you have had your fun with him. I am sorry to have to break it to you, but if you will try on your next relationship to hold out for a while, then you will find a more respectable man. Makes for a BETTER relationship. If the man doesn't stick around, this is because he wanted you only for sex or as a rebound from his break up. I hope this helps!!

This is a tricky one, you gotta wait to hear his story to know how to deal with this one. Update your question once you have found out more news.