Confused

So here's the thing, yesterday I told y'all that hearing from someone unexpectadley made my day really good. I also told you to say hi to those close to your hearts. Well, I didn't expext to get surprised twice within the passing of two minutes. Two people who used to mean A LOT to me just contacted me but it didn't make me happy. It made me confused, why now all of a sudden? What do they mean? Should I reply?

Here's what happened: I signed in to msn, and a window popped up.. someone I hadn't talked to in months had written something that made no sense. The person was asking what I meant and asked about a link. The person also asked me if we know each other now? I reread it maybe 5 times, asking myself what the hell this person was saying and if I should reply. I still haven't replied and I don't know if I should. Then I noticed I had gotten an e-mail. When I saw the name of the sender I was chocked. It was a person whom I used to trust completely before I got backstabbed. The person always used to send me greetings but when I refused to reply the greetings stopped. Now in the e-mail the person was asking me how I was doing and told me that even though I wont reply the greeting was a must.

So right now I'm confused, what should I do? What road should I take?