Your boyfriend's family do seem rather self-centred, and I suspect you are not very assertive. Remind yourself that you have a life of your own, and stop being so accommodating. Invite them round for coffee, tea or something, and if they don't or won't come, that gives you the message that you're welcome in their lives but only on their terms and on their home ground. Once you made the effort, it's then up to you to shape your own life and stop feeling that you're always bound to accommodate their needs without it being a mutual arrangement.