I went in my college roommates drawer without his permission

My college roomate had a vape that he got for free and never used and I went in his drawer to hit it and he came back and found me with it. I was aware how much of a violation of privacy this was and am seriously questioning my morals but I don’t know if it’s because I was caught doing so or because I genuinely feel bad. He didn’t really care about the vape and just let me have it but I feel terrible for violating his privacy. Is there anything I can do or say about the situation or do I just let it go (I know how stupid this sounds)