I think you can spend time going out with your friends->having tea sessions, doing sports together, movies, partying perhaps and etc...Don't keep on telling yourself it is hard or give reasons to yourself that you can't do it, you need to try to take the first step to social...courage and confidence are the keys...
Read books that give us motivation and aspiration like autobiography may be? When is the last time you laugh? Watch comedy or entertaiment tv shows, find the laughter...Laughter is the Best Medicine.