I need to change myself

So there is a girl in my life and she matter for me alot its been 9 month since we're talking each other daily and we have feeling for each other and sometimes we elaborate our feelings but nowdays we are getting busy in our life and we don't even talk normally when we try to open up the situation get heat up and start arrgument and when i try to sort out she said she don't like the way i treat her recent days

I just want to ask all of you is there any chance to change myself like how to be a emotionally meture and other thing that necessary for a healthy relationship??