It's doing things. That is also different from our normal understanding of love. The feelings we call love motivate us to do things for others. For example, love motivates me to do things for my wife. But this love in 1 Corinthians, this love outside of us, actually does things, with or without us.
Love is patient, love is kind.
It does not envy, it does not boast, it is not proud. It is not rude, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. Love does not delight in evil but rejoices with the truth. It always protects, always trusts, always hopes, always perseveres. In fact, Romans 13 tells us this love is perfect in its activity.