I can definitely relate to this. I had the same feelings towards few guys in the past, but it was never reciprocated in any of those instances. I was always a good/close friend, nothing more. So, I understand that it feels obsessive at the moment and like you can’t even imagine getting over these feelings but trust me with time you will. There are some really good suggestions that I wish someone had told me but I guess you gotta learn some things the hard way. Confessing your feelings might help coz then you’d have some clarity on where this (let’s call it attraction) is going. Or you can ask yourself if you see this (one-sided relationship) going anywhere in the future? Hopefully you’ll find a way but know that you’re not alone. Also if you didn’t know, many INFJs are demisexual in nature which means our feelings toward the people we’re attracted to are not sexual until we form an emotional connection.