love is a very difficult emotion, as it is not always as simple as love or hate, you can love someone but hate what theyare doing, e.g if you have a young child, you will usually love them, but on occasion may hate the temper tantrum they are having. just cos you hate the tantrum, does not mean you hate the child or you may love the roast you had for christmas lunch, but hate the sprouts on it.
love is in my opinion a feeling you get like a tickle inside when you see someone you care about a lot or who you can't imagine life being without.
you know you are receiving love when you feel totally safe and content
you can show love by giving hugs or lip kisses, by doing nice things for the person without being asked, by sharing good times together and the most important way is to make the person feel safe and content by doing things they like, you need to think about how the person feels and make them happy.