Only Once In My Life

It has been years being single..sometimes I feel lonely, but other time I feel everything was fine.. I was jealous to see couples..I always think when will I feel it?when will I can be happy with someone??when will my turn to be happy?? sometimes I just feel if God is not fair..He gives everyone happiness but none to me.. have I done something wrong??I just ask only for happiness even at once.. once in my life I want to feel kind of feeling to love and to be loved.. once in my life I want to meet someone who love me cause who I am..no perfection.. is it too much??did I ask too much??to love and to be loved, just that once in my life..