The love you seek from others can only be achieved when you are willing and able to truly love yourself.
Notice that a friend or loved one is down in the dumps? Write them a simple, one line appreciation statement letting them know how much you care or that you are proud of them for....anything. Seal it in an envelope, leave it on their pillow, put it in the gym bag or briefcase, etc. It might not seem like much but that one sentence of appreciation or praise will make the world of difference.