How do you know if you really love someone?

I truly think I love my bf. But I think I over think it because of media, meaning that I tell myself “you think you love him but you really don’t” because I feel like I’m not crazy about him like i should be or get butterflies. I can’t put into words how he makes me feel, I catch myself randomly thinking of my bf and getting so happy. Boy makes me laugh so much, makes me feel hella lucky. I don’t even how to describe it, i suck at expressing my feelings. So how do you know if you truly love someone? Since I don’t really express my feeling and push them away I don’t usually know what I’m feeling. When we were going out i didn’t even know I liked him, my friends pointed out all the reasons and I quickly realized I REALLY REALLY liked him. It’s like people I try to hide my feelings as a way to protect myself from being hurt but they seem clear to others and not to me.