I felt like you, and I never discussed my full feelings about my baby with anyone but my husband, because I knew people would say I had PND - the only other option was that I was a monster that obviously didn't love my child 😬
I felt nothing more than a basic desire to keep him alive, until about 4 months. By 6 months, I was like, ok yes, you're pretty damn cute.
Now at 7 months, I still look at him often and think, you're amazing, but god I wish I could go back to work right now, and only see you evenings and weekends like my husband does.
When people ask if it's the best time of my life, I smile and nod, whilst secretly thinking God no, babies are dull, and I was so much happier when I was well rested, working, having frequent sex, going out, earning good money, travelling etc - who wouldn't be...?!
I'm very sure now that I'm not depressed, nor am I a monster. And I love my child. But being at home and going to groups and talking about babies etc. is just not my thing. And that's ok, because one day all the things I miss will come back! And then I'll have all of them, plus a super cool little boy!
Only you can know whether or not it's PND or if you're just not a Baby person. just because it's not the greatest thing that ever ever happened to you, does not mean you're depressed. However, feeling detached from your baby can be a sign of PND. Time for some soul searching and a chat with someone you trust perhaps.
Good luck