Curiosity about love

I have had this on my heart for so time and I don't think I can talk to someone about it Irl so I will just ask anonymously. What is love? I don't understand it, is it to care about someone, to protect them, and be with them. If so then why don't I feel that way about people. I have my parents and I care about them deeply but if they were to die I feel like I won't feel anything. My mom would often call me crazy and uncaring because whenever someone on the news would die or something similar I would say something along the lines of "Glad that wasn't me." or "Sucks to be them." and after some thought I realize that does sound kinda rude but why should I care about a stranger. Why should mourn and feel depressed about a random person. Am I suppose to cry and grieve for someone I don't know. I just don't understand how people can go out of their way to love and care about someone who isn't even of their own blood. I also so have a lot more questions to ask but I will just stay on this one topic. That's all I have for this one and sorry if this sounds like a cringey-emo 12 year old seeking for attention but I would just really like to know what love is. ~ H♤