Buying a home is not an investment unless you are able to buy below market, or unless you are able to add value in some specific way ( through sweat equity, or by being real estate savvy, and studying and knowing likely appreciation due to changing economy or improving area.)
Buying a home and maintaining it is an expense of living. It costs money, and for most it is their single biggest expense.
At the moment you do not have this expense and it is enabling you to save and invest a great portion of your earnings. It is hard to overstate the value of this given the fact that every dollar invested at this stage of your life will be compounding for a very long time.
I had a similar situation years ago- When I was in college I went to work at a theme park in the summer. I am a musician, and while playing a Sunday gig in a nice church, I met a nice little old widow who had known my sister when she went to college in the same town. She invited me to Sunday lunch. That year I was living in an apartment with some friends. She and I became friends, and she told me if I came back next year I should live with her (she had a big house, plenty of privacy for us both.) When I came to do the same job the next year, I decided to live with her - the rent was very cheap (she never actually asked me for any money, but I insisted she take 200$/ month to at least defray the utilities) She took the cash I gave her and set it on her bed side table. After I moved in we became even better friends. She enjoyed cooking for me, and I helped her out with little chores around the house. Her son's were happy to have someone there with her all the time since she was getting a little older. Eventually she refused rent of any kind. Simply would not take it. The money I had given her sat on her bed side table forever. My job turned into a more long term seasonal thing. I lived with her off and on (since my main jobs required a lot of travel) for 11 years.
In that time I saved, invested in a real estate, stocks, funds, etc. Instead of paying 50% of my income to pay for housing I was able to have irreplaceable life experiences with someone who became my family- and I was able to be a good friend to her and help her in many ways too.
As a result of those and some other mustachian tendencies, I am floating on FI. Even though I work, for the last year our investments have been creating enough income to pay all our bills. I am 35, and have never earned more than about 36K from my work.
Now- you have to live your life, and there is a stigma to living with your parents, but it is silly. Imagine if they were some nice folks you met at church. Would it seem as weird then? Enjoy the time with the people who love you as long as the situation works. Make sure you contribute in whatever ways seem best. If real estate prices are good, then invest in a rental. Oddly enough, I am getting ready to move into a rental I bought 12 years ago that is paid off - which I bought when I was living with my friend. How many get to experience never paying a mortgage? You have an opportunity to do something like that if you want to.