I wouldn't give up my hobby. Though you spend more time with her, you still should be able to have hobbies in your relationship, and she needs to respect that. Maybe selling your laptop is a good way of telling her that you will spend more time with her, but even so, you are a person, and entitled to a hobby as she is also, and you aren't asking her to give up her hobbies (and I assume some of them are expensive).