Should I tell my family about my gf because I feel bad about hiding it from them

Hello I met a girl in an online game, and we are in a long distance relationship. I haven’t told my family about it and I feel bad that I’m hiding it but I want it to be confirmed before I let them know.

And I want to know if it will work will I be able to get married to her,if yes then when?…. Also which profession will be best for me?

My DOB is 27/09/2004 at 6:00am in Meerut

And her DOB is 03/04/2005 at 7:25 in Lucknow 

• Thank you!