Love is when you care about things and give for other people. You show that you care for other people and you give what you can. Trying to make friends is a sign of love. You are willing to give yourself to people to connect with them and do good with them. It goes even further when you begin to develop a relationship.
A man donating money to charities. That's love!
A girl trying to open up to other people to become a friend. That's love!
A boy giving flowers to the people he cares about, including his sweetheart. That's love!
A woman who shares her cookies with her children. That's love!
It's all about sharing and giving all kinds of things. When you say "I love you", you are basically giving yourself to that person. You are showing that you care about this person in a deeply emotional way. When it comes to friendships, you don't have to say "I love you" or "I like you". You show love by sharing and giving. The giving doesn't have to be physical, but it can be psychological as well. For example, you can show support for a friend or give advice to the person. Or, you can just give some loyalty by showing up when you say so or spending the night at his/her house. It's REALLY simple to show love. It doesn't have to be about hugging, kissing, sex, marriage, or other things. It can also be about sharing, caring, and giving. Many people just don't really see it that way.