I would like some advice. Some serious and some comedic.

[Gandalf]

Your girlfriend needs to chill out and just accept your honesty for what it is which is a guy trying to be genuine. I think many women, knowing their own base nature and knowing that most men are base at heart too, have a very hard time when they come across someone that is genuinely honest. All you can do is be open and if she has a hard time dealing with that then that is her problem. I wouldn't change anything just to make her happy. You can't dump your best mate because of an irrational woman.

Be a man and stick to your principles.

[Howlin Mad Missy]

hey, if my typing is messed up it's because I'm posting from my phone & the reply box doesn't fit the screen

some couples/people have a don't ask don't tell policy, some have full disclosure.

Bilbo, I do prefer honesty but he did kinda shoot himself in the foot by having her about in a 'friendly' manner, e.g. Facebook.

She could of course be vindictive, like me, who has agreed to meet for coffee, someone I slept with who I know is a cheat & a liar, who is back with his ex.

I know it looks bad even if he's just trying to be friendly.
Good. I want it to look bad I'm going to go dressed like a hooker.