I am 19 years old about to be 20 on Saturday and through all my life I have had a real bad attitude problem being it towards my family or my relationships, it didn't matter I would always have one. I am in a relationship right now and it's a great relationship but here in the past couple of months I have had a real bad attitude towards my other half and on the 27 of this month it will be six months. My other half keeps telling me tha I need to fix my attitude and to be honest I don't know how to do that. So I am writing this to get help on "how i can change my attitude towards my relationship".

Congratulations on wanting help with this at such a young age. That's a huge step right there.
Can you give us clues about this attitude? I would guess that you tend to get angry quickly and mouth off without stopping to think, but if you could give us say 2 or 3 examples?
Also tell us what you are doing with your life. If you are 20 and have no job, no career path, no school or training, it can sneak up on you as this looming new adult 'thing' that is pretty unsettling if you hadn't given it much thought before, and make you even more angry at the whole world than you were as a kid rebelling against parents.