<human>: Can you give me the gist of the text in a nutshell?

Dated a guy for about a month, we were attracted to each other from the start.  All of a sudden he became distant after we had sex the first time, prior to that we were just fooling around and having a good time together. 

He said his ex was back in the picture and things were getting serious between us and he couldn't let it go far as he wasn't sure what he was doing. I felt dumb for not seeing it coming, so I stop talking to him. Before we parted ways, he sincerely admitted to not using me and confessing to liking me lots. 

Problem now, we do not talk at all and he continues to like my Instagram photos. I don't understand why he's making that communication through social media? I don't want to read too much into it since I can see he likes other women's photos...question is, if the ex was back in his life (or claims they had a talk) ..why feel the need to continue to like the photos of ex's?? Its not like I'm posting selfies! 

The reason why it bothers me is because I truly believe that you should leave people alone after you break up. These actions feel like someone poking your open wound. 

Any advice? Am I reading too much into this? The fact that a man liking photos of women can most likely just mean there is nothing behind the action?
<bot>: briefly dated a guy who ended things because we were getting too serious and had unresolved issues with an ex, but continues to like my Instagram photos.