My gf yesterday told me that she still mises her ex, they broke up 7 months ago but she still cries for him every night and sometimes i also feel like she's getting away from me but she tells me that she loves me. should i be worried?
You should definitely be worried. This kinda a character, male/female, who whine about their ex, are to be avoided like plague. I dont know if u have given her your best. But, if u have, and still she is missing the ex, the only option left to you is to dump her and move on. Girls are monogamous in nature and if she really loved u, she would not have cried for her ex.
Yes, you should be worried! You should either end the relationship or start dating other girls in parallel. Otherwise she will hurt you badly.
Be strong like a man. Your well-being is no less important than her.