Sorry Otaku-kun, but these days won't continue forever. You wait your senpai to call you instead taking the initiative to do so, you who is shy are simply stagnating in your safe zone of being passive. And as you continue to do so, you give the impression to not seek out your senpai's companionship.
Eventually your senpai will find someone else, fall in love and start dating. When that happen she'll pay less attention to you, she won't value much your friendship because it wasn't really deep anyway, you are effectively just a playmate. You won't ask to play with her because you don't want to "bother her", you're pretty much alone.
Kinjo? Yeah she's willing to talk to you, but you don't have any common interest with her. You're still shy, you don't have balls to do any with her so it's not going anywhere.
Himekawa hates you.
Mysterious girl? You're not even an acquaintance, with your shyness and low social skills, I am pretty sure you will go nowhere.