Love is something that is abstract but heartfelt as an emotion. It is expressed according to how we view the idea of it. Regardless of whom we are and where we are in the universe it comes down to a deep feeling of affection that one person has for another. There are different types of expressing that affection. People express it by giving and receiving it in different ways. Love can be between friends, platonic, romantic, sexual, humanitarian, and religious to name a few types of this emotion as it is manifested.
One thing that is interesting is that love also can create attachments between people. Just like there are different types, there can be different types of attachments. You can have a mother and child attachment or a romantic attachment for starters. We can also love things. For instance a person can love eating chocolate. However one's love for a thing and attachment to it is different than the love one feels for a human being or even a pet.
Interpersonal love is the type that occurs between human beings. It is a more intense feeling than just two people "liking" each other. It implies a relationship between two people as well. Most of the time when we speak of it it's usually on a romantic level between a man and a woman it means different things to different people.When you have love for someone you want the best for them. Two people who have it for one another want to naturally be there for each other. They help each other unconditionally when there is a problem.