Exactly...actually to elaborate on my previous point...they are BOTH the cause of each other's misery as well as salvation...it's all about which side of the coin you choose to look at...Rudra killed Paro's husband (haan woh uska pati nahin tha technically😆)...yet he also saved her life...he kept her captive in his house as a witness...but always protected her and saved her life time and again...Paro's definitely got one thing right...they both aren't meant to stay away from each other...Destiny brings them together come what may...even if their own internal conflicts seperate them, Paro's every reliable Bholenaath makes their paths cross over and over again...and this time they both have something to contribute to this seperation...Paro has trapped herself through this vow and has to follow through with it based on her characterization...and Rudra can't help but feel betrayed and abandoned based on the past heartbreak he's suffered...
As for Rudra's fear of falling in love...oh he is definitely wary of being betrayed...that's one big part of it...the other big part of it is that he feels unworthy of being loved...time and again he's asked that question rhetorically and answered it himself..."Itna bura hoon main?"...he feels that he's so beyond hope as a person that he is incapable of being loved or loving someone...his mother having left him at that point and him having been a naughty/willful child...somewhere these things combined in his mind to make him think that his mother left him because he gave her such a hard time by not listening to her...that he was a "bad" kid...and that feeling has carried on to adulthood...he doesn't consider himself a GOOD man...an HONORABLE man, yes...but not a GOOD man...he carries those scars mentally...
The fear of abandonment is a big part of his insecurities...and they highlight that time and again...most recently in yesterday's epi when he thanks Paro for saying she will always be with him...and the fact that he's reached a stage where he's sharing so much of himself willingly with Paro speaks for the faith he's developed in her being there with him always...but the scars are still pretty raw inside...his outburst over Mala proves that...this is just a temporary coating on the problem...he still has his doubts when it comes to love...cuz he's seen the most selfish side of love in a sense too and he's lost faith in it...Paro has come a long way in restoring his faith, no doubt...but that faith still remains to be tested...and there's a big test coming up now.