posting online - unhealthy relationship?

Taz
So I'm in my first serious relationship, with a guy who has been in two serious relationship before me. 
I like to 'lowkey' post things online. Like photos of us online, not very personal things but like photos from a night out, or something like that. 
I remember him telling me that he didn't want many photos up, so I've tried to keep it to its minimum. 
However he's just asked me to stop, and I don't get why. He tells me people 'say' a sign of an unhealthy relationship is having signs of it on social media. 
I was wondering what your views were on it? 
Do you think this is true? 
I don't post anything like "I love you so much" or comment anything 'soppy'. 
I don't know how to feel about it all, I'm over thinking it a lot. 

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