Guys, He follows me but won't let me follow him?

He checks my stories everyday, I know he has a girlfriend, we three work together. She and I don't work together directly though, he and I do for a few hours a day. They've been having problems and he doesn't want to continue with her anymore. He has been following me on instagram for weeks. We've texted each other twice, yesterday he really wanted conversation and said we would talk later. Today I sent a request to follow him and he hasn't accepted after 6 hours. He HAS been checking my stories in the meantime though. He hasn't texted me. What's up with this?
Guys, He follows me but won't let me follow him?
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