I took a break from my T and met with a different T because my feelings towards T1 were becoming overwhelming and painful and he wasn't open to talking about it.
I found it incredibly useful, so useful in fact that after 4 months I decided not to go back to T1 but to continue with T2. I spent at least another 8 or 9 months working mostly through my feelings for T1, but I never regret the decision I made. It was the best thing for me.