Kosmusun bana

is it... are you running from me?

Thanks!

it should be koşmuşsun bana

you came to me (muş - you didn´t saw it with your eyes, but someone else told you)

koşmak - to run

But written as it is, it doesn´t mean anything?

" You came to me" makes no sense, there is no context...

May be it is  " Küs müsün bana ? " --> Are you mad at me ? 

                                                        Are  you angry with me ?

                                                        Are you offended by me ?

Yes, that´s more like the case.

Thank you, and sorry for the misleading misspelling 😊