How to know if he's inlove with me?

Hi guys,

Me and my boyfriend just started being together for 2 weeks now, we were seeing each other for almost 4 months before he asked me to be his girlfriend.

In my culture, once you dated. We drop the " I love you" already so I feel a bit worried being with someone and not saying I loveyou to eachother.

I feel like he's not in love with me? Or does it men takes time before they drop the L word?
How to know if he's inlove with me?
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