Guys: do you ever say "I love you" in a joking way to a girl you are interested in?

It's pretty confusing. "Love" has so many different meanings: "I love corn," "I love you romantically," "I love you as a friend," "I love my mother," "I love what you said just now," etc.

There's a guy I've been talking to for a couple months and it's pretty clear he likes me (considering he asked me out). We were texting just now and I sent him "I'm not really into sports but I like video games about them" and he replied "I love you. :)" That's the first time he's ever said that. I played it off like he was joking (I HOPE he was joking) but he hasn't replied much since then. He wasn't serious was he? I mean, who says it for the first time over text? And because I said I like something he likes? We've only hung out once! >.<

And if he WAS serious... what should my course of action be then?
Guys: do you ever say "I love you" in a joking way to a girl you are interested in?
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