see there are some hints in this story about Armaan and ujaala. Writer is smart as to never giving us hint about end game here but Ujaala says that dulhan comes to a house with all her armaans and hopes and lives in that house forever until her death.This is Ujaala's wish and her god has to grant her that wish.
Yes love should carry trust, respect and understanding with your partner but getting possessive and feeling jealous seeing her with someone else can be a good twist in a relationship. If armaan sees her with Hamza or finds out that they 2 could be involved he may feel bad and that will show he wants her in his life. Its complicated but I think such twist can bring out a lot progress.
Yes Hamza ujala wont be the end game but I dont think it will be a bad climax if chooses Hamza over armaan bec like I said the Sobia angle makes armaan case weak. He rushed into marrying her and she have waited some time. He is seeing ujala goodness now and if Sobia wasnt his wife he maybe more inclined to ujala anyways.
The way she says those lines made me think that Armaan will one day bring her back to the house and give her every welcome she deserves.Plus if Armaan had called hamza to sort out Ujaala's brother so that he could fly out with sobia then I would have thought writer intends to give hamza ujaala a happy end.
I feel Hamza's character is there to help Armaan realize her worth.even though OST hints Armaan will have doubts about Ujaala ,I wish they deal with it differently and show that Sobia/Hamza may ask armaan to release ujaala so she could also have shot at love and thus causing armaan to reflect on his own feelings and frankly hers,She loves her husband unconditionally.
Writer took pains to show why Armaan would marry sobia and how much wrong he did in that,but she also showed the extent Hamza went to torment and scare Ujaala into this present state of mind,so she is being smart in rooting for both.
One thing I feel Ujaala may teach Hamza is to seek happiness of person you love...he is going to do it and may even be instrumental in bringing her closer to Armaan in the end.
So far despite Armaan's marriage to to Sobia he may be the one for Ujaala than Hamza.
Also ruby from Ujaala's point of view it would be a sin for Hamza to love a married woman.