Practice, care.. remind yourself that you love her and that you want her to be happy.. keep reminding yourself that this not about you. Change the way you think about sex.... it can be done.... By doing this I stumbled upon the most amazing thing...

I can have 10, 20, 30 orgasms without cumming.... or I can cum in 2 seconds....

It is all about self less ness

But it used to be all about me and then it only lasted 2 seconds.. sometimes I'd cum in 1 second... Now it is about her ...her.. her... and ...well you get the picture..