I swear I'm so close to cheat on my gf by blowing some random guy on grindr (again).

The main reason I don't do it is because of STDs (I also feel bad but that's only the second reason), I would be worried until I make sure I didn't catch anything. If I ever catch something and my gf got it too, it's just the end of me.

Should I do anyways? I can take a vaccine for HPV, and take PrEP. What else can I do, and what STDs should I worry about?