First of all, you mentioned that she has treated you coldly as
compared to the last time. As you have mentioned earlier, you made
a mistake that caused you to breakup. But, under your
determination, you guys managed to patch up.
=> Give your gf a break. She might be keeping a distance from
you because she is trying to protect herself as she is scared that
you might hurt her again.
Secondly, you tot that she can make a good wife, thats why you
tried to patch up.
=> Wake up! Do you really love her for what she is? or, simply
she can be a good wife material?
Thirdly, you mentioned that after patching up with her, you can
concentrate on your career.
=> What the heck! Do you know the meaning of Love? What
relationship is all about?
Stop complaining and think whether you are doing your relationship
a justice!