I think it’s hard to make and maintain friends too! Especially close friends. It definitely takes effort and time. I think you should know that not eveyone has a super busy social life – if you think everyone does, that alone may inhibit you. Perhaps you can figure out what YOU enjoy doing, or things that will benefit you and your career, and just keep doing it but in a social way – this is how many good friendships are made – whether it’s book groups, (libraries have them, churches, YMCA’s), running clubs, church, bicycling groups, Toastmasters, etc. The most important thing is to go and have fun – if you’re having fun and being friendly/sociable people will want to be around you. I wouldn’t try too hard – share a little as you see the same people over and over – it may take some time, but it’s worth it! Suggest meeting for coffee or lunch, etc.