How Can I Practice Being Less Self-Centered?

I’m a 27 year old male and I feel like I am a little more focused on my own interests than what I ideally “could” be. I have an Aunt and an Uncle who recently sent me some money for my birthday (on the 30th of September) and last time I called them to Thank them, my aunt said “You know, you can call more than just to thank us whenever we send you money”. She didn’t sound angry, just a little disappointed, but it is generally true that I will usually only speak to relatives when they send me money or do something nice for me. It’s

not lost on me how this can seem, especially after an extended period of time.

        I was taught to always write Thank You notes or at least call people to thank them whenever they send money or gifts which is something I continue to do as an adult, however I tend to see it as just another thing to do in a growing list of things I have to take care of including going to work, taking care of laundry and cleaning my apartment each weekend and so on. This makes me wonder though “Am I honestly grateful or just doing what’s expected of me?”. I feel like I am a bit too grown to be thinking like this at this stage in my life.

       I’ve had many hours of mandatory overtime at work for the past three months, nearly everyday and week and I am saving to move from Colorado to N.J where I have friends and relatives I’d like to see more often. On top of this I’m even taking voluntary overtime and making tons of money.