Help!!!

I am so confused. I have been working at a company for a while, 2 years as a contractor and 1 year as a full time staff member. Since becoming full time, my workload and responsibilities have lessened dramatically and people have been hired above me. Instead of being addressed by name in project meetings, I am now referred to as "team" and expected to sit silently and just do as I'm told and my efforts on projects go largely unnoticed and unrewarded. If I reach out to members of my team (not only management, but now people at my level and beneath me) to discuss a project or ask for assets, 95% of the time they ignore my communication and don't respond at all. Yet, they reach out with rush projects that someone else spent 3 weeks working on and didn't hit the target, to have me turn them around in a few hours...then--they communicate openly and frequently. Once the rush is over, it goes back to the silent treatment. I am a very hard worker and will put in 150% on every project I work on. I compliment people on a job well done and really try to be a team playe, so this persistent ,really what I think of as mental abuse, is taking a toll on me. I have tried talking to my boss (who was supposed to be a friend from a previous job) a few times and its only made circumstances worse. I've also tried pivoting and trying to shrug things off and just immerse myself in my work...but ultimately I just don't feel like an integral or wanted member of the team. I don't know what to do, how to carry myself day-to-day with them or who I can turn to for advice or help... Has anyone been in tis position and have any advice? I'd very much welcome the input!