You need other Jews, you need a minyan, you need a congregation. And you can't be a fully realized human being all by yourself, cutting yourself off from others, judging them, rejecting them, withdrawing from them, plotting to use them but never really connecting with them. There is perhaps no time that we feel as alive as when we discover that somebody loves us. It's one of those moments you never forget. The whole world is different.
Colors are brighter, sunshine is warmer.
Think of that classic movie scene of Gene Kelly singing in the rain, not minding the rain and the puddles that the rest of us complain about, because he's in love. Being loved validates our lives, because human beings were not meant to live in isolation. We were meant to share our lives with others. Buber would say God is found in relationships. We realize our humanity, we become convinced that God is real, when we connect with other people.