If a guy hasn’t asked to be exclusive after 5 dates should I assume he isn’t interested in me in a serious girlfriend way and move on?

TikiTook
I’ve known this guy for 6 weeks. We’ve been on 5 dates and each date gets better than the last and we enjoy ourselves more. We’ve been having sex since date 2. We both agreed we’d like to see where this could go. Last time I was over at his place and after sex, it was silent and I said “I like you” and he said “I like you too” and I felt good but id, k.
I’m used to guys in my past asking me to be their girlfriend after the second date or like a month in of seeing each other, and now I just feel disappointed because this guy hasn’t asked me to be his girlfriend or even to be exclusive. But he told me he hasn’t slept with anyone since before covid and during covid hasn’t had anyone in his bed or over at his house so I don’t think he’s really going around seeing a bunch of others either? But yeah, I don't know if I should try to move on? My best friend told me if a guy wants to be exclusive he’d ask as soon as he wanted to be exclusive, so I’m feeling bummed.
If a guy hasn’t asked to be exclusive after 5 dates should I assume he isn’t interested in me in a serious girlfriend way and move on?
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