AITAH for secret double majoring

I (21M) am trying to double major and I am keeping it a secret from my fiancé (23M) I started on the track for Degree A and started to fail becuase I wasn't putting in the work (hanging with freinds, concerts ect) and then he convinced me that I wasn't going to finish college keeping this degree. So I now am doing degree B. I recently discovered that I really love Degree A and want to go back but everytime I mention I'm not satisfied with Degree B amd don't see me working a job in the field in the future he says we'll you aren't going back to Degree A. I haven't been able to even talk to him about it because when he says thing like that I feel like I don't have a choice. So this semester I am thinking about secretly doing classes each semester to get the degree I want but I am worried if he finds out he would want to marry me anymore or fight with me. Doing both degrees is really hard and I would be doing 17 credit hours a semester and 10 credit hours each summer but I would be able to get both degrees in 3 years. Also we are moving after three year and I won't be able to prolong both degrees past that