Hi Sunflower,
Ultimatums can go very wrong unless you are fully prepared to carry out your threat. Compulsive gamblers are the masters of threats but those who love them are not necessarily so, so please be sure that you are ok with how you will feel if he does not give you what you demand by March 1st. If you change your mind, having given him a deadline, your boyfriend’s his addiction will see it as a chink in your armour – a weakness.
I wish you well in whatever you decide to do
Velvet