A second love gives you reason to continue to believe in love, but more importantly, it gives you perspective.
Love is not only about having someone or about being in a relationship. Love is an ability that you have and no person or heartbreak — no coming or going of a significant other — can extinguish that ability.
You fell in and out of love once and survived, then, you found the ability to fall in love again. So, if and when that second love passes, you’ll know that heartbreak does not destroy; you keep going.