Am I being rude here?

I suppose I am someone who worries easily that I'm doing something wrong, and in this situation, my boyfriend's family let me stay at their place for a couple of weeks while I had job interviews, since i'm moving to live there. I initially felt very uneasy staying that long, looked at apartments, etc. but after all stayed. I left a few days earlier than I was supposed to, and that was about 10 days ago. I left because I was afraid i'd have to come back later in the month for job-related purposes. The family are extremely kind, and always say stuff like i'm welcome there whenever I want, I can stay whenever I want etc., but I still always feel cautious and that just because they offer it, it doesn't mean I should do it. Even while I was there, they bought me several presents and stuff, which I even offered them money for as I felt very bad taking them all. While I was there, I also tried to help out as much as possible by doing the dishes, helping set the table during dinnertime, cleaning around, and I took his little sister out for the day, though it wasn't exactly a chore, it was nice for both of us. But last week, I received offers from 2 jobs, asking me to go at the beginning of next week (this next week coming) to sort out the timetable and sign the contract. One of them asked me to go just days after I left, but I knew I couldn't return right away, so I asked if I could go a week later. I was afraid to tell them a few weeks later because I did not want them to choose someone else instead, since I knew they probably needed to do the timetables asap. The second one told me the contracts needed to be done before July 20th, because she was going away for a while and so had to have everything organised. Since they were both within a couple of days of each other, this indeed meant that I had to return to Paris next week. I would have felt absolutely terrible returning to their house just 2 weeks after I left, even if it was only for a few days. I told my boyfriend about the meetings, and he said that I was welcome there anyway, and I could stay longer than a couple of days if I wanted. I really wanted to change the dates to later, but I had remembered the woman said it needed to be before July 20th, and the other job I thought i'd lose my offer if I couldn't come for a few weeks. My boyfriend said to make sure it was worthwhile to come, since i'd be paying another flight fare etc., and I knew that it was, since I'd be doing contracts. In addition, this is exactly the sort of work I want to do, it's really my dream job, and I'm really grateful to have been offered it. I thought that I could maybe just leave them and look for more work in August, since that sort of work is fairly easy to come by for native speakers. But I figured it would be silly, since I may not be offered interviews again, and I would be doing the same process; having to stay for a long time, etc. and no job certainty. I offered to stay in a hotel, etc. and to change the dates, and we ended up having a big argument about it. Finally, he told me his parents had confirmed I could go back next week, and I thanked him, and told him I'd book my flights, and we left it at that. I still feel bad for returning, even if it's just for a couple of days. Am I doing the wrong thing? Should I be looking for a hotel? And does anyone have any advice about how to stop feeling bad/uneasy in these situations? Because this is what causes arguments with my boyfriend... Thanks in advance.

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