I need some help.. its a long story but bare with me.?

alright, so I like this girl alot! So anyway a month ago her friend told me that her mom hated me and that she would never ever let me see this girl. So i text this girl(krista) and i say i think we should see other people because i think that your mom will get in the way of our relationship. and the only way we can date is if she sorts things out with her mom! so we didnt talk for three weeks, and those three weeks were HORRIBLE! no matter how much fun i was having, i always thought of krista and this brought me down alot. so anyway after those three weeks i tried texting her, but my number was blocked! so i use my friends fone to text her and she still liked me too. so we get back together, so her mom found out that she was still talking to me so she blocked my bros' and my friends numbers! so krista told me that i offended her mom somehow wen i told krista we shud see other people. so krista's gonna give me her mom's number and im gonna text her mom and apologize for being "rude" bc thats wat her mom said i was. so heres my question... what should i say specifically in the message? i really really like krista and i dont want to move on:( please help me!