My Girlfriend (F29) says I'm (M27) is not a boyfriend material.

My girlfriend and I were together for 7 months and we're in a LDR from the start of the relationship.

We were having a normal chat over a phone call. She jokingly said that I'm a very nice guy but not a boyfriend material. She also said that I always want a princess treatment. I got a bit confused and asked her to explain what qualities are considered as boyfriend material. She just skipped the topic and asked me not to worry about it.

Dear Redditors, please help me understand and become her ideal boyfriend.

TL;DR