Is it crazy for me to like only one girl and not be interested in anyone else?

OrangeNarutoNinja
I tried different dating apps and liking other girls in person, but I still like the girl that I’m interested in. She’s on my mind a lot. I’ve never felt this way about anyone before, ever. I know that I have strong feelings for her, but I’m not sure, if this means I’m in love with her. This is all new to me. Her name is Emily and she makes me feel a type of way, whenever I see her and I see her all the time. Although, she’s 19 years old and I’m 28 years old. Her birthday was in March. She’ll be 20 years old next year. I completely understand that she’s not looking for a relationship right now and wants to focus on school for the time being. Her future is more important, than my feelings. Do you think I have a chance to be more, than friends with her down the line? I don’t know, if this is loyal or just plain crazy.
Is it crazy for me to like only one girl and not be interested in anyone else?
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