My boyfriend says he wants to setlle down with me, what does this mean?

You have your answer, he wants to be alone with you either living together or you having your own place so you can be alone. He wants to be with you.I think he put that quite plainly actually. If you want to live with him I suggest you sit down with him and have a chat about how you two are going to manage financially if you live together. If he really wants this and you want it too I am sure you will come up with a solution. First thing you must establish is do you want to live with him?