<human>: Broke up 5 months ago after a lengthy on and off. Been doing well as I've accepted things. Tried to be cordial but I realized I needed to respect his new relationship. This was a month and a half ago and I haven't been in contact since.

Got a message from him on a dating app where he said "nice photo." Took me a couple minutes to realize it was him. I replied "ty" and left it at that. I noticed he's single again. Which is funny since a month and a half ago he told me how awesome he was feeling in a new relationship. I think he was trying to make me jealous. 

The whole scenario made me chuckle a bit tonight. Thought I'd share and tell you guys to keep going strong.

Can you condense the text into three sentences or less?
<bot>: Ex contacted on dating site to say, "cool photo." He was listed as single when a month and a half earlier he was telling me how awesome he was with someone else.