Why am I so emotional?

Good to hear. As an added bonus, listen to music. It will sound better than anything you've ever heard.

You may have been suppressing your emotions, and now that you've opened a door and you are 'letting someone in' the emotions are being 'let out' through the same door.

Just a possibility.

But I cary so easily even in the film :/ I can't watch something scary or groosem anymore and I feel so girly for that.

Everyone is a little different in how they deal with their emotions.

Consider this - Films aren't people - they are safe to let your emotions out in.