I guess you feel that since you dropped everything to wine and dine your son and buy him clothes you feel hurt that he can’t even let you know where he is when he is not home.
Your son is at that very selfish rebellious age. But he does need you and deep down I think he feels badly that he is hurting you. You need to be very patient, with time they do mature and grow up! Do NOT allow him to ruin your upcoming simcha!
We continue to daven that things will improve very soon.