It's one thing for her to think it but to say it to your face speaks volumes about how she feels about you. She wanted to hurt your feelings and get a reaction from you.
Whether or not her comment is a dealbreaker is up to you. . .but it wouldn't be suprising if trust her less after her dumb comment. You may decide in the future, that she's not compatible with you.
its as simple as that ... u ain't gat wut it takes to get all of her ..in other words, ya game just ain't tight enough, so step it up or be ready to step out. sorry