Though Avina disclosed their relationship and they already engaged I think I can comment on this.
Avi cannot control to postpone his marriage with Ruby after 3 years. He is so much in love with her. It seems so. Also she is so caring for him and doing all the responsibilities. It is so sweet of her. Her expressions are very cute and she is such a sweet doll. How can Avi will wait for such long for marriage. But fortunately they are in the same serial together and it is all by God's grace. They are blessed by Kahna. God bless both of you and happy happy life long together. I wanted to write this after I seen yesterday's episode. Ruby's expressions were very cute yesterday. I like rad more than dev from CB1.