Am I selfish… please read it all!

My boyfriend and I have been talking for quite a while and he hasn’t always had the best relationship with his brothers since he moved states. From the time I’ve met him he had little to no contact with his brothers. Out of no where his brothers decided to come back into his life(which I have no problems with) but, his brothers are in a state where they don’t have a lot of income and I feel like they are trying to get him to start paying for everything again. His brothers asked him to buy them a plane ticket to the state we live in within a month. My boyfriend is very excited but, I have been feeling a little apprehensive because his brothers caused a strain in the whole family. My boyfriend recently started working a new well paying job and he’s been letting a lot of people know. We were sitting in the car and his younger brother calls they were talking about getting him down here as soon as possible. We are currently going through financial issues and the fact that he’s so caught up with getting him down here so quick is upsetting me. I explained to him that I’ve been paying for most of the bills even if he makes double what I make because he just started working this job. Another thing he did was offered to have his brother without my permission ride my motorcycle so that they could ride together. And during this whole FaceTime it was like I didn’t exist I stayed quiet during their interaction because I don’t know his brothers I only heard stories about them. I also told him I don’t wanna be seen, but he began to talk to his brother about the females out here as if I didn’t exist. The whole thing has just been frustrating because I want him to have the relationship with his brothers but I feel like it’s moving to fast especially after the heartache it caused the family. I want to tell him how I feel because it is a big financial responsibility that we would be taking on, on top of taking care of him for the duration of his stay. Before I sit down and tell him how I feel am I wrong?