Answer Question
If your ex-boyfriend only friended you on Facebook (and has not sent any messages), then he may just be interested in reconnecting on facebook, to see what you're up to, and / or just to have another friend to his facebook. If he is not in a relationship, he may be looking to reconnect, but would wait for any interaction from him with you to really figure out what his intentions are.
Does he like me?
How do you know if you can trust your girlfriend?
Is there a way to get old Facebook messages from someone who blocked me?
How do I know if a Facebook friend is creeping on my profile?
Presence PrivacyInitial Data on facebook?
If an ex boyfriend likes my profile picture on facebook does it mean he likes me?
How can I stop a Controlling Partner?
What's the difference between being Passionate and being in Love?