Corrections in red.  Stylistics in blue.

Correct the mistakes please)

Mary: Jenny why are you still stuck in there? Come out! The guests can't wait for you forever!
Jenny: I'm afraid and don't know what I'm afraid of. Why I should do it? I can change my mind, right? ohh
I think it's a mistake, yeah definitely. How I get out of this mess?
Mary: Wow! Listen! Bobby is waiting for you. He loves you, you love him.  This is happiness, isn't it? What kind of mistake are you talking about? Bobby is such a desirable man, every girl envies you! He's every girl's dream.
Jenny: I know, but I'm not sure that I should be marrying now.  Maybe this isn't the right time for it. What am I supposed to do?
Mary: That's enough, I called Bobby!
Jenny: No, no, no!
Bobby comes to the door.
Bobby: Is everything alright darling? Mary said you've got some problems, so what kind of problem? Is your dress torn?
Jenny: No, my dress is fine. Iii.. I don't want to get married, but it's not because of you. The entire problem is mine.
Bobby: What!? Are you kidding me? You are gonna say that to me in front at the altar, or what? Don't be stupid.  It would be a great shame on us, if we cancel everything what we've done!

to be continued..