making adult friendships!!

Anyone else find it incredibly hard to make friends and actual friendships as a adult? I'm 20 and recently found out that the people who I was friends with I actually have nothing in common anymore and are really not the friends I thought they were.. but now I feel quite isolated as they was the only people I would have classed as friends but struggle to make friends with people my age.. any ideas on how to overcome this? It's really starting to bother me and get me down, I just really struggle to find any common with anyone.. (I do have anxiety too so I think I don't help myself sometimes but I do talk to anyone and be friendly and bubbly enough (just being myself))