Hi maru & nice to have you as a member of Pherotalk 
Good that you decide to join this forum & your keen interest in pheros Hmm so you are looking to spice up your relationship?
Ok here is my recommendation to spice up with your long term girlfriend there, try Turn Up The Heat + Instant Honesty as it is suitable for intimate relationships.
Here is a link about Turn Up The Heat & Instant Honesty as well as the other pheros here> mens pheromone guide & another link on how pheros works> What pheromones can do and what they cant Updated and i leave it to you to decide on my recommendation there.
I hope i was able to help you out there. See you