Asking for birth control at 15

Before anybody comes for me because of my age I have been with my boyfriend for 2 years and we just started having sex. I wanna ask my mom for birth control but I’m so scared she will think I’m a whore or a disappointment. She loves my boyfriend so much she says he’s like her son and I don’t want anything to change between me and my mom or him and my mom. I feel like I need to get on birth control since I’m having sex tho, we use condoms but those don’t always work. If you were a mom of a 15 year old with a boyfriend that you love and she came to you saying she’d like to be put on birth control how would you feel?