This is only one way but in my view one of the most important. You will be happier when you have more friends. 

Want to know how to make more friends? Don’t be interesting, be interested.

Want to keep the friends you have? Nourish the friendship with a “Crackerjack moment”. Offer up a little surprise which can be a small gift, a card for no reason or even just a kind word. It will be so appreciated and remembered. 

Now go hug a friend….and both of you will be happy!