Don't sweat it.. It's part of the industry. How many pilots are out there looking to move up to a bigger plane or a higher paying job?? Pretty much everyone.... So why wouldn't an owner be looking for a better situation?
Everyone's advice here is solid. Especially the one about not burning your bridges. I have more than a friend or two that got let go for a cheaper option, only to be called back 3-6 months later, with the owner wasn't happy with the new pilots. Be the kind of pilot you are in an emergency.. Grace under pressure, cool and calm

At least you have some time to look into other options before you get blind sided.