AssalamuAlaykum Ayesha!
I can relate to you pretty well, actually! And I will say that it's a VERY good thing that you can feel that you've been a sinner for quite a while. Better late than NEVER, really! Atleast you have have realized that you've not been what one should be. It takes quite a lot of courage and self-abasement to even get to that point. But you have done that and mashAllah i appreciate that.
Sometimes we feel that: hey, you know what, I am a human being afterall, i was bound to mess up. so why just cry over such a thing. This has happened to me already Ayesha and i know it sucks. It is true that we are human beings and we are bound to sin. We are forgetful creatures. But then maybe that is why He created us. He is Forgiving, Merciful and Compassionate. How would He be so if there weren't creatures with free will who faltered and then repented? However, that doesn't mean that we are inclined to evil. He made us on the inclination to Good.
We have some sense of evil to actually value and know what good is. But if evil pervades our Good, then that is against our Fitrah. We should realize this before its too late to repent.
This place is a testing ground. More like a classroom. we learn to be humans here with the resources that God has granted us. He has given us the sense to know evil so that we can move towards good. Praying and struggling for it adds more to our humanity. To sit back and have no remorse is not a wise thing to do. Its non-human. Allah SWT has shown us both the ways so that know what we are into. It is either the Acceptance of the Teacher or Rejection. And acceptance can only be attained if we confess to the teacher that we have done wrong things. we have messed up and want an out from that place. He will help you inshAllah for we know that He has the Power to do so..
Sister, i feel that you've come a long way.
Please keep struggling and contemplate on what your life has been all this while. Don't panic if this takes long. because "slow and steady wins the race".. If we race towards a thing, we usually trip in between and fall back. So, if at all, it takes you long, it's fine, inshAllah, you'll learn. It will be a journey of self-discovery... How much potential you have to be patient. And i'm sure that inshAllah you are patient..
If you can't cry anymore.. then don't worry. How about cry over the fact that you can't cry? I have done that. I have been through what you are facing. I still am. I havent 'recovered' fully as yet. And sometimes my tears abandon me. And i cry over IT! The more you cry, the more remorse you feel. Get it all out of your system Ayesha!
remember that we as humans are inclined to the Good of things inherently. We forget that, and then evil takes the better of us. But to overthrow evil is possible too. Its a matter of choice and patience. Try to correct yourself where ever you can. Gradually things improve. It doesn't happen overnight! And try to feel more positive about things. It is hard, i know it is. But it's worth a try. and crave for His help.. He is Most Merciful.
Prayers.