You truly love someone when you can see yourself with the person for many years. You truly love someone if your willing to do anything they ask. When you feel like being without them is missing a part of yourself. When seeing them makes you happy even though you had a bad day. That's what I think it means.
When you love someone it's uncontrollable. You can try to fight it but it just is. I love someone and it's really pure. All I want for him is to be happy, it's unconditional, I can't control it. I'd never want to hurt him. Ever.
The truest love is when you dont care about anyone but them, you would do anything to make them happy.