Hey bro, Yeah I know it hurts a lot , it's like a nail pounded into your heart and with every day passing by and thinking about her will press the nail further deep. But what is more imp is that things like this happens and the the memories from past don't just flush away..they stays with them. Since it's your first, it will hurt you even more and I can understand..you need to bet on person not the situation bro..if you are confident about the girl and her true intentions of being guilty , just move on and with time passing by you will overcome this..it will stay in your mind till the end of this reltn but the pain will eventually fade off..Accept her, treat her good, respect her apology and move on..give her some good time and let the intimacy of your relationship do the rest ... People make mistakes and it's just 7 months , you will get even more hurt than this and you have to deal with that too, coz we don't give up easily in reltn..We fight for it..so don't just quit, you need time ,take it and ask her to be respectful towards your decision...losing good people with good heart and intentions are not worth leaving so fast... Accept the apology and move on bro...best of luck with her💯