Ever not felt confident about your relationship with another person despite them showing interest?

i'm struggling to feel confident about things with this girl , i've been seeing her all the time lately and she displays a lot of signs of obvious interest in me. but its been a struggle to take things to the next level and so not feeling confident about her as i'd like to.

i'm not sure what to do , not really considering walking away and trying to date someone else instead but entirely clueless as to what it would take to actually get what i want out of a relationship with her at this point.
Ever not felt confident about your relationship with another person despite them showing interest?
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