Why did the girl only stop talking to me suddenly and starts avoiding me only and talking normally to everyone else?

[MananSuper]

[PrettyPriya]

Well, I think most will agree we will need a bit more context to the situation to give some good advice. This is just simply not knowable without some details surrounding the situation.

All anyone here would be doing would be guessing. Might I suggest adding an update to the question with some details? I would like to give my best advice but really can't without some more knowledge.

[-Ira-]

You have to not pay more attention to why she's avoiding you but how she's avoiding you, the way a lady avoids you can tell you a lot about why

[VV3ZZY]

Sounds like a bitch to me. Probably better to put her on the "Do not Contact" list

[VV3ZZY]

You just got to understand Boundaries. "The negative things people say about you, actually are more about them than you."

[Avicenna]

Maybe she is nervous around you because she is afraid of making a mistake

[Esperanto]

Cause she is not into you and wants you to know it.

[Guy13]

Maybe because she got the “you’re a freak vibe.”❓

[JoyGirl]

We need more detail, hun.