What are guys thinking when they blurt out random things when they hardly know you?

There have been a couple times where guys would just say to me I love you when we hardly even knew each other or just met, and one time a guy said Let's just get married the first time we really hung out.

What do guys get out of saying these things? And for what reason?

Am I giving off some vibe, because I love you and Let's get married are pretty heavy things. Why say it to me when we just meet?

Thanks.
What are guys thinking when they blurt out random things when they hardly know you?
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