Not Being Expressive with Happy Emotions

Hi, I’m not sure if this is an ADHD issue, but I’ve always heard that i come across as cold or dry. I’m not overly expressive especially with happy emotions. When I get a gift I admire it and say thank you. I’m not sure how others react to gifts but im often told by my husband that my reactions are underwhelming. Similarly his sister just told us she was pregnant the other day. I was very excited. I’m not a very touchy person and I went in for a hug. I thought I came across as super excited. He told me that my reaction was once again underwhelming. I’ve never been someone to squeal or jump and down from excitement or happy cry publicly. Can anyone else relate? I feel so alone in this because nobody can relate to me in my life.