How to tell a girl that you met for 2 weeks that you like her in a way that she won't stop talking to you?

there is a greater chance she will stop talking to you if you text her or tell her online. Do it in person. If you're super nervous (which is normal) write her a note and hand it to her in person.

If you decide to man up and tell her to her face also, just pick a spot/ time that's kind of more private for her, and don't make her uncomfortable by standing on a table and yelling it out.

She'll respect you way more if you say it in person or hand her a note like that than if you just text or do it online.

You can tell it over text or chat online if you feel nervous. Some people say its fake but It just feels less awkward. Anyways tell her I like you. She wont stop talk to you if she likes you so plus you can know her feelings about you, Goodluck.