Guy emails me: is he interested or just being friendly?

Anonymous
I've started to talk more frequently with a guy at work. We pretty much confide in each other about work related stuff and he's easy to talk to. We're also nerds and chat about conspiracy stuff!

The other day he asks for my email address so I gave it him. Anyway checked my email 5 days later and I find 4 emails from him!

The first email was him just asking how I am?

The second email was telling me about a YouTube video on conspiracy stuff! He also drops his phone number and tells me to ring him.

The third email he tells me to get well soon cause he finds out from a work colleague that I was not feeling too well. He also tells me to email him when I get a chance

The 4th email he says he's worried because he has not heard from me and then makes a comment about friends do worry!

I thought the emails were a bit much tbh, but then thought maybe its just coming across all wrong so I email him back saying that I haven't been feeling to well and appreciate the concern etc...

Anyway he replies saying it was nice to hear from me and he hopes I get well soon. Then he says that if I need to talk or if I'm feeling down then I can call him anytime on his number, which he reiterated!

OK The last email kinda freaked me out a little!

The fact that he said I can call him anytime does this mean that he's trying to increase my comfort level with him first, so he doesn't seem too pushy asking for number so soon?

He says I can call him anytime does this mean he is interested and is he trying to tell me he has no wife or gf?

Is he interested or just being friendly?

Guys have you ever emailed a girl and given your number, and what were your intentions behind it? Did you wanna just be friends or were you actually interested in her?

Cheers!
Updates
+1 y
I should mention that when he emailed me 4 times, it was over a course of 5 days and not in one go! so one email pretty much every day..is that normal?!
Guy emails me: is he interested or just being friendly?
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