Moving back in with sister

I recently broke up with my boyfriend. It was extremely toxic and it wasn’t working out. I moved in with my sister. She has a big house and two babies and her fiancé. They are both wonderful and don’t expect me to pay anything except just help with groceries that usual stuff. They really are wonderful. Why do I feel like a loser though? I have a good job at the hospital, my own car, and I pay all my bills but I’m in such a rush to get my own place and I’ve only been here about a week. My sister says to not rush and just pay my debt off and than look for my dream place but idk I’m 30 and just feel lousy. Should I feel lame moving in with her? Idk I kinda do even though they are so sweet about everything. Idk if it’s just having to get used to not having my own place or if I really am just a loser. My sister and I have always been really close so it’s not about feeling uncomfortable I just feel bad about myself right now.I can afford my own place but my sister just says to take my time.