4. How do you recognise love?
There are many types of what 'love' is. Even the Bible mentions different types of love like a friend's love, family love, romantic true love, as well as unselfish love. How to recognise what is real and eternal love?
You recognise someone by their deeds. Jesus says a tree is recognised by the 'fruit', the results of what a tree produces
Each tree is recognized by its own fruit. People do not pick figs from thornbushes, or grapes from briers. (Luke 6:44)
What are the fruits then? The apostle paul gave some examples, love, peace, kindness, self control etc. So you can see by the way a person behaves what his real motives are and if he is acting from love. If a person appears nice and friendly to others, but from the inside actually dislikes others, you may see this back eventually in the little and big things he does.
But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, and self-control. Against such things there is no law. (Galatians 5:22-23)