When it comes to what is or isn't boring, I usually lay the blame at the feet of the person making the accusation. Only boring people get bored.
Not saying that everybody has to like or be interested in something, but in general those with a lack of curiosity or inability to hold a conversation tend to put the onus of entertainment in someone else's hands.
Maybe you could try digging deeper or get them to open up about their interests. Maybe it's just not the type of personality you're into. I don't know the dynamic you two have well enough to help you with that decision.
That said, he does seem to be a little too over eager to be in your life and that's a massive red flag. It's kinda like his way of exerting influence over you, by being that one person you can rely on and therefore pressuring you into letting him cross certain boundaries. Hard to tell without knowing him. Maybe you just give off some damsel vibes and he can't help but feel sympathy
