No idea what to do with my life

I’m 28 I have my own house, girlfriend of 8 years which I’m really grateful for. But always felt like I’m not fulfilling my purpose in life or just don’t feel satisfied with my current career. I don’t have a “dream” to chase, so find it difficult to comprehend what direction I should go in.

Im basically looking for some advice as it eats me up inside everyday, and keeps me up at night. I have always felt this burning desire to be more in life, but never been able to figure out my true purpose. Any advice would be much appreciated.