What should I do ?

Hi, so i'm in a relationship for like a week now, and the guy really likes me. But me, I don't know if I like him as much as he does and I don't want to hurt him, he's so sweet, gentle and also I'll feel really bad to break up with him cause he's the best friend of my best friend (Girl). But at the same time i'm not very confortable with him like with others and I don't always want to ne with him, I like to spend time without him. Gosh what should I do??😩