Been hard lately

I got one friend who talks to me whenever he sees fit and most of times I'm just feeling lonely as fuck. I'd send a message and either I'd be left on read or get a one line response after 4 hrs saying, I am doing this. it's been hard because we don't live in same city and I feel like we are growing apart and it terrifies me coz we had a great bond and besides that friend, I got no one else to talk to.