There may be many reasons why people do not respond to you on social networks, there is no need to react negatively and unequivocally to this. All people, everyone has their own affairs with varying degrees of busyness. Now, if close people treated you with indifference, this would be a wake-up call to sort things out if this is very important to you. In general, in such situations you should always be straightforward and ask why this is happening.