Loosing virginity plz help ???????????????

ok ma gf is comeing over tomorow and we will be home alone and she says she wants to have we have been dateting for 5 months and im in love and love her so much. i have a few questions when i go in her she will bleed right ? and my friend said when she lost hers extra skin or something comes out bec u broken ur hymen or w.e she said is that true? what will happen ? help plz