New mom of 5 month old

So I had my first baby 5 months ago! Since becoming a mom I have realized it’s the most amazing thing I’ve done. However at the same time it’s confusing. I’m a stay at home mom right now. I love my son so much! But sometimes I want alone time. Not often. Then once I get alone time, I miss him. I’m not sure if these are normal feelings or not. I really hope so because I feel guilty about it at times. Please tell me I’m not crazy lol