First time sex

Boo
I'm 15 years old.. I've been with my boyfriend for a year now (who is also 15) and we have decided that the time feels right to have sex... but I'm scared as this is both of our first times.. I'm worried that the condom may break or I won't be happy with my decisions and wether or not I made the right choice to do it so early or not.. Advice please x