YANBU. No matter how much you love your husband, many people would would go batshit crazy if they were with him all the time. And women need their 'me time,' (and men do too, but not as much as women IMO, because they lead more stressful lives than men!)
I love my husband dearly (together over a quarter century and married for over 20 years,) and he is great company, and good to talk to, but on the occasions he has been around a lot (like on leave for 2 weeks when we don't go anywhere, or on sick after an op or an illness,) he drives me CRAZY.
Problem is, he never goes anywhere else, and has no mates. He has workmates, who he socialises with occasionally, but no mates, and no other family, (except half a dozen cousins who live abroad.) His parents died 10-12 years ago, and he is an only child, so he relies on me heavily for support with everything. Some days, he doesn't stop talking, and narrating every scene of whatever he is watching on tv.
It's OK for the best part, but can be quite exhausting. On the other hand, I do love him, and if I had the choice, I would not leave, as he has so many other good qualities. And I do love him! AND he has given me 2 amazing children.
Upshot is, I retreat to my bedroom (had separate ones for 7-8 years, because of health reasons and his colossal snoring!) and I go watch something on netflix there, or just read a book. If I didn't do that sometimes, I would go mad.
After over 25 years together, I DO feel that I can say 'I need to be on my own for a bit!' because he learned early on that it's nothing personal. Maybe say you have a headache or you just need to go rest in the bedroom for a bit as you feel tired. If he says 'I'll come!' just say 'I really want a bit of downtime on my own. It's not you, I just need to chill on my own for a bit.'
Some men (not all) are like this; very clingy and needy, and take it as a personal slight on them if their wife/partner dares to want an hour on her own! Yet men pursue many hobbies and interests that exclude women, and that's OK. 
If your partner gets arsey, he will have to suck it up and get used to the fact that you can basically do what the hell you want, and he needs to not be a baby about it.