E.D.
I believe that we don't always get to choose how we feel, but we DO get to choose how we react.
I'll be honest, I sometimes feel jealous and/or envious of women who have something that I admire. It might be something as insignificant as a nice wardrobe, or as meaningful as a good relationship to their mom. I can actually use my feelings as a tool to look within and figure out what I want, what I have and what may be missing.
When, for example, I felt envious and jealous of my (amazing, powerful, worked for it herself) friend who's going to nursing school in the Bay, I was able to see how much I desire an education and a career. Instead of letting my feelings eat me up, I can tell her how much I admire her and let her give me information and insight that will help me develop a path for my own education and career. I love hearing her stories because they encourage me. If she can do it, I feel like I can do it. Her experience helps me to remember my own potential.
In this particular instance, my friend is childless. She is about my age and has chosen not to have children yet. There's a part of her that wants to be a mother and wants to do that now - she's giving that dream time, so that she can finish her degree first. So I get to have her stay with me when she visits and she is an "auntie" to my kids. She's able to benefit from my life and I'm able to benefit from hers. That we both look up to each other and learn from each other brings us closer together. We are able to give each other insight from our very different realities and can be a great support network to each other.
I looked at your profile and it appears that you have four children (she only has one). No wonder you feel tapped and don't always have time to pursue hobbies! Between work, children, your house and your husband, you have a ton on your plate. Shoot, I admire you for being able to do all of that. I also think it's admirable that you know how you are feeling and are bringing it up. It shows a lot of courage and accountability. It sounds to me like you are actually quite in awe of this friend. Try to remember how amazing you are too!
It sounds like maybe you feel out of balance and that you don't feel like you have the space to tend to other facets of your life and being. Perhaps there is a way that one evening out of the week is YOUR time. If that means reading trashy magazines and taking a bath, then great! If it means pursuing a craft or art, fantastic! If it means shopping and finding something special and within your budget, wonderful! Or perhaps you could spend time on a work project. It could be anything that helps you feel good about who YOU are. Because, IMHO, when we get to feeling this way about someone else, it's NEVER about them. It's about how we feel about ourselves.
Good luck!