My ex asking questions

I broke up with my ex of three years December of 2007. I haven't spoke to him I believe since Feb 2008. I am in a great relationship. And he's apparently recently engaged. He added me to Facebook, and I actually thought he may have found out my mom is very sick with cancer, and the doctors don't want to do anything else.

Well today he sent me a message questioning why I ended things with him, and how he was hurt, and single for 6 years. He has trust issues with his girlfriend over my other ex I dated right after him. How she talks to her ex. I did try to maybe give some answers be needed. And told him How happy I am now, and no matter what my boyfriend and I talk about things openly No matter what. He should do the same.

Now, before anyone says I should of ignored him I know though mutual friends he had a very hard time with a breakup. I also had my one ex kill himself in March. And my boyfriend at one point before our relationship a few years back bad Suicidal Thoughts over a breakup. I guess I was scared of they fail he might do the same. I don't want to be a reason

But why now? Why was he questioning me on why I ended things now. It does sound like him, and his girlfriend might be having problems.. But I don't want him of kill himself over it if they break up. Nor do I want to be apart of the reason... I just have that feeling. Idk why