Is he trying to get my attention?

Not enough info. Where are you posting photos, what are the photos of, etc. We have no idea what he is seeing or where and therefore we cannot give any kind of informed opinion.

Any photo . It can be news , personal photo of family or a selfie.

On what platform? Where is he seeing these pictures? Is it a platform where you could interact with him? Personally, I find it a bit creepy. But that’s me. I’m not big into social media. If you have no interest in him, let him like photos all day long or block him. If you are interested, merely “liking” his photos to show that interest is a bit childish. If you are interested reach out to him to initiate real communication. If he is indeed creepy, cut off the communication politely but definitively.

It looks like you noticed, so yes, and it worked.

And what @seawulf575 says.

The true sign of a stalker.