I am currently working two jobs (each part-time). One of the jobs is clinical and one is a research position. My role in the research has changed and I have begun training in on my new role. It is not for me. It is a very boring and isolating job and not at all what I want to do, but Ive been told multiple times that they’re counting on me. I feel very guilty, but I’d like to get out of the job. I don’t want them to waste more time training me. I don’t want to disappoint them by walking away so I’m having a hard time saying anything. What is the most professional way for me to quit?