I had this dream last night that I was friends with a girl whose face I never saw. I tend to have dreams a lot where I remember a dream that I had within my dream and The dream I remembered was meeting her. She was walking on her way to the hospital when I met her and she was struggling because she had a prosthetic leg. Any ways, in the current dream I was having, I was sort of on a big bus where I met her brother. We had talked for a bit and it would seem we both had a romantic interest, despite me having my boyfriend in my dream. The girl and her brother both went to my school.
Later on, the girl and I both went walking to the hospital again. As we we're walking, we started talking about girls and sexual matters for some reason. When we arrived to the hospital, I was suddenly with my boyfriend and my sister boyfriend. My sister's boyfriend was in a small cubicle, almost like a bathroom stall and asked if I wanted a tattoo. I said no and instead asked where I could get someone to help my boyfriend to tighten his prosthetic because it was falling apart. In the dream, I felt truly happy, as if I was truly appreciated for once.

It seems to me that the girl in the dream represents you, and the prophetic leg represents something in you that feels incomplete. Walking in a dream can represent a journey toward a goal, so this could also have to doe with an obstacle that is preventing your from achieving a goal.

A tattoo is something that changes your outward appearance, so it seems to me that your refusing to change your tattoo means that you realize that to solve a problem you have to do more than just change things on the surface, you have to get to the heart of things.

Since you were talking about sex in the dream, this could have to do with sex or relationships.

Your boyfriend's prosthetic falling apart sounds like you are noticing a problem that he has that is preventing him from achieving what he wants to achieve (Does he have a prosthetic in real life, by any chance? Is he your boyfriend in real life? It's hard to tell from your post?)

The part at the end where you are happy because you feel appreciated - in real life, do you feel that people don't appreciate you or you aren't very helpful?