<human>: I am 21.

I have always thought that I am fairly good at communicating with people, but it seems that all my efforts in the last 6 months have hit a brick wall.

I used to have a fairly decent friendship group: people I went to high school with, people I went to Uni with, people I worked with. About 6 months ago, that group became a lot smaller, maybe 5 or 6 people I stayed close with after leaving Uni and getting a full time job.

I know my hours at work (8.30am-5pm M-F) make it difficult to do some things over the working week that I used to do while at uni eg. going out to clubs, hanging out with friends until all hours etc. But when I try to get in contact with people to try and arrange to do something over a weekend, I feel as though get avoided or plans never work out. 

Any advice people have to pass on would be wonderful.

Condense the text into a few key points
<bot>: I haven't seen the people I considered to be my "best" friends in months, and when I try to, things seem to collapse.  Advice?