It sounds like you are really discouraged. The situation you described is hard. It sounds like the relationship you felt got pulled out from under you. But it has nothing to do with your worth and in no way minimizes your past relationship with your brothers. One thing you might consider is that it is normal for teenagers to pull away from family and become a little self absorbed as they try to become their own person. It may also be that dealing with your moms illness was not something that they could handle right now. Maybe they arent as attuned as you or as strong or as mature. Whatever the case, it has probably been hard for everyone. But especially for you it seems. But hang in there. Your relationship with your brothers is changing right now but it doesnt have to end. Your brothers will most likely mature with time. Try to take care of yourself, and try to navigate this transition as best you can. Remember what you had with them and continue to try to connect with your brothers in ways that work for you. Maybe in small ways with fewer expectations for now. Above all, be proud of who you were and who you are. Be good to you. Change is hard.