Anxiety issues. What should i do?

Hi . There can be a couple of reasons 1. he may be involved with his work and as and when he sees your message he is replying.. liking pictures doesn't mean that he is ignoring your message ....to like a post is easier and quicker then to write down a message ... 2. Secondly was he different in his behaviour towards you while you were  together ?...... most important to know is ..not whether he has changed his behaviour towards you but   how you react to  this ...keeping a watch on his online post or to see whether he is online or not...  stalking him etc  is going to do bad for your mental health... so stop doing that... if he is still cares   and loves you  he will make efforts for it......if he has stopped sharing his life details with u (if he was doing that earlier )then either he is going thru certain things in his life which he is trying to handle his own way or probably he has changed is approach towards you.... Whatever the case may be you will have to wait and see.... give him a space to behave the way he wants before you jump into any conclusions