So today, I told my advisor that I needed to submit a plan of study by the end of this semester. Originally I was suppose to go the thesis route, but I decided to just take the safe route and take the extra courses to graduate instead of possibly extending my graduation and failing the defense. But I told him that I wanted to just take the extra courses instead of writing a thesis as it won't really help me in my career (I'm not going into academia nor any research). This includes losing my RA internship by the end of next month. I came from a physics background lacking any CE and CS work and I thought taking 3-4 more courses in CE would help me a bit more. Then I got a look of "UNACCEPTABLE" from him because I guess he seems to be disappointed for wasting his grant money on me. I did accomplished on finishing a major project during the RA, so I didn't felt it was a waste. I have a summer internship next year and would like to take a bigger/relevant courseload next semester to help me prepare for it. Is this the possibility of burning a bridge with my professor? He didn't seem to like my new plan and I'm trying to be as professional as I can be and giving him at least over a month's notice.