5 years with same girl, oral sex not the same seems like she does (quite rare) without any desire, and others stuffs like not kissing each other (only during sex)
The thing is we love each other but i think the passion is gone, should i just leave? We have a dog together, plus once so many time together all your social life is stucked on that relationship (family, friends, etc) And also how awful it will be when she start dating another dude, i can see me already stalking her social media and crying
but if they both love themselves, they should break up just because of bad oral sex? cmon
maybe OP just stinks af, he has brazillian flag after all, that might be the reason why she doesn't want to suck ur d nor ur lips
Have a conversation and see if she is feeling the same way, make sure you word it as to not offend. Don't put the blame her, be mature about it. This might be something you both want to work on.
Don't do something like get engaged or have kids just to save the relationship.