22M I had break up with my gf 25F idk what to do , but the main concern is she took decision cause her sister says to live alone what i should do in this situation?

Today after having multiple conflicts and up down we finally broke up, I was still saying for no but she blocked me all and , i am not feeling good nor i m feeling to do anything, i tired everything went on bike trip , joined GYM even played games to distract myself but still not able to get outside, the main concern is her older sister says bad about me and says My gf should stay alone and even at last moment she took her suggestions about what to do , i literally begged and cried to stay and said let's meet and discuss about it as it was going on and off from very long

My background, I'm a guy with no girl as a friend ever , even at 22 i don't have any girl as a friend, our relationship gone for more than 4yrs and really had very good t ime as it was my first experience having such , rn I m working as AI engineer and i feel i m a good guy as even my y frnds says it ,i really don't understand what i should do now

Should give her some space and then try to contact her back or let go ( i really don't want it , i want to meet her once and show I'm not the kind of person she thinks online)

Yesterday I was acting bit mad cause of her decision and I said her sorry multiple times and i will get meeting her in this month I tried my best to switch my job and get into her state and place

Thank you all ,please help me I'm having sleepless nights from many days thinking about it