Is he trying to make me jealous?

My ex and I have been broken up for the 2nd time for about 3 weeks now, he started liking stuff on twitter about missing me and emotional posts like that... I haven't talked to him since we broke up and usually he is used to me giving in and talking to him about a week after (because I did that last time)... he goes back and forth between liking sad posts to liking posts about not caring about me or "cutting toxic people out of his life". Now he continues to post pictures and snap chats with other girls or around other girls.. he's never touching them or anything to far but just enough to make me jealous i think? someone help...
Is he trying to make me jealous?
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