Some people are good at being in love. Some people are good at love- two different things in my opinion. Being in love is all good and sweet when there is the first excitement of the new found love- the laughter, the jokes, the never ending conversations, the chemistry of the reaction- the best point for the both of you. But the test for being good at love starts when the reaction stops and all the energy has been used up and all that is left is charr and some fumes- the worst point for the both of you.
If you still want to be with that person when they have nothing to give and you have nothing but yourself to offer, thats when you know its love. That's when you know you are good at love.