I think the point of his story was that he didn’t feel lonely but left out at times when he was younger because of how his family and friends make him feel telling him things like you NEED love or someone to have a complete life but that’s not true for him. And it’s condescending to assuming you know what he wants or need better than him. It’s complex but I think he’s completely satisfied and happy with his life.
!!!I'm sorry you felt pressure!!! I understand you weren't actually insulting him, and you're clearly empathetic about his situation, just that you might not have known what it means to aromantic. Please don't delete it, I think it's a good way for others who have had similar thoughts to understand his circumstance! Once again, sorry about that, you're not an idiot at all (We've all had instances like this)!!!
Thank you to both of you for understanding me and for explaining me about sasaki-sensei situation. This will be my lesson that search before comment once again I'm sorry! and I'm not good at english so my word just limited and just a basic words so I'm sorry if I have wrong grammar (;ŏ﹏ŏ) once again thank you and I'm sorry!

Gosh I'm crying because of sasaki sensei I just feel sorry for him that he can't feel any attraction to other people, so I feel like he is so lonely.. I wish for you the best sensei...