Five dates? If it doesn't happen after 2, not gonna happen. NEXT.

As everyone says its highly likely that she is just not that into you so next. There is a small chance is there is a genuine mental/ psychological/ medical issue holding her back but if so, do you want to be dealing with that? What is the chance that you have the magic key that can turn an intimacy avoiding mental case into a warm desirous woman, when no one else could? so next is still the answer.

Per the AskTRP rules try to answer your own question somewhere in the post

If she were attracted to you, she'd have fucked you by now. Don't waste anymore of your time or effort on her. Ignore whatever mouth noises she makes; her actions say as clearly as she can that she isn't attracted to you.

From first year Rational Male, which is part of the sidebar: Wait For It?.

I might have escalated too quickly on the night and not built enough comfort.

You didn't escalate quickly enough. A woman who wants you will fuck you on the first encounter

not built enough comfort.

Comfort is only to be given when it's earned. As in, she's been fucking you for several weeks or months and adds value to your life besides sex.

Giving comfort too soon, especially when it's unearned, turns women off.

Failed to overcome LMR

That wasn't LMR. that was a rejection. Next.

She's not that interested in you/has no fear of losing you and yet you are still giving her time and attention.

That's what you are doing wrong.

Whatever glorious excuse/exception you are rationalizing that she has in order to not accept that she simply lacks enough interest does not matter. It's not your job to fix any of those things even if they do exist. Her issues are not your responsibility.

There are millions of other fuckable women out there turning 18 every day. Go find one that doesn't waste your time and actually wants you.

four dates

NEXT

I am positive that had nothing to do with the last date. If a kiss is that dramatical with a girl it usually means you've given her way to many nice guys signs and she realizes she can use your attention without giving away her intimacy.

Messaging her after what she did renforced exactly what she had in her mind; you're way too nice. You should continuously push the edge early on. Otherwise you'll be classified as an orbiter.

I did these mistakes years ago, I was complimented a lot by the ladies of how much of a gentleman I am, but it was just that. I never got laid, until I put myself in situations where rejection was a high possibility.

My advice is to go ghost on this chick completely.