Uni friend

My friend from uni wants me to get another subject as her for next semester. I've already chosen one subject that she chose and I'm not sure if it's a good idea to chose another one. I'd be all for it if she wasn't married and we didn't get on a bit too well. I think it might be a bit of an overkill because we are always in the same group and always work closely together. At the same time by not choosing it I don't want to make it look like I don't want to be in both classes as her. Ideas?

Claim that it would put you under an excessive workload? That it would clash with another subject? That the subject doesn't interest you?

Something.

Boundaries, Mish. Set them. Enforce them.

It depends on the subject