I have to be honest here, but I am scratching my head at a student who would choose to downgrade for no good reason, just to be able to see a friend more often. Maybe you need to make new friends. Maybe you will find (as is all too often the case) that you or your friend are a little too close and need to create some space to appreciate each other when you do get together.
I’m sensing insecurity here. I suspect you are worried that your friend is going to move on and you will be left without a bestie. I suggest you get out there and meet new people.
If you and your friend are truly good friends, nothing is going to change that. I am still best friends with a woman I met when I was 21. I am now in my mid 50’s. We see each other once every couple of years, if we are lucky. Your friend should be cheering you on at Clemson. You should make the most of your opportunities.