Guys: Why do you try to make a girl jealous?

Anonymous
About a month ago my ex told a friend he had no time to date or even meet anyone. Today I messaged him on fb and a few hours later he put up a pic of him and some girl. He hasn't had a girlfriend since we broke up and I find it strange that now he all of a sudden has one. When I broke up with him he tried to make me jealous by dating another girl right after and rubbing it in my face. I'm not certain if he is intentionally trying, or maybe is telling me he's over me or if he really does have one now.

It hurts my feelings because I loved him and still do and only broke up with him because he didn't seem to want a future together.

Do you guys think he is trying to make me jealous? And why do men do this?
Updates
+1 y
I also forgpt to say that he NEVER has a girl in his profile pic...
Guys: Why do you try to make a girl jealous?
2 Opinion