I loved them at first. And then despised Mayank when all he did was support his mommy dearest. He became a real ass, and treated Gunjan horribly. At that point I thought Gunjan deserved better. Although now, he's really supportive. And Mayank is being really nice now, I would hate to see him stuck with someone like Charu. However in all honesty, I actually want to see Gunjan with Rajiv. They're both mature and I think they would make a hot couple. As for Rachna, I don't think she's at all mature enough to have a guy at this point, so for Rachna-Rajiv pair, it's a no.
If Mayank and Gunjan were to get back together, I would want to see it not as solely as a reason because Mayank wanting to be with Gunjan. I want him to divorce Charu because she's mean. And I wouldn't want to see anything happen between Mayank and Gunjan while he's still with Charu. That would make Gunjan look horrible.