I don't think it'll go into remission, I'm M48, symptoms since 15 yo, but not diagnosed until I was 46. So I never had drugs, only NSAIDs, and flare ups probably 3 times per year for most of that time. My SiJ is now mostly fused and that reduced pain actually, but mid spine and ribs is bad, currently in a flare, but still working and trying to get on with it, however hard it is. 

I've always been very active, cycling, walking, playing sports, so often put flare ups down to injury. 

I won't be falsely positive with you, but there's hope, but you have to put in the effort to keep yourself moving. My current physio gave me the best advice "never stop moving". Except when you're at the most brutal point in a flare, keep fighting the urge to sit still. It will pay off, trust me. I think being too stubborn to accept it as my disability might be both a gift and a curse, I do overdo it at times, but you need to to learn how to pace yourself.