Hey Ali!
don't worry I won't throw tomatoes at you. In fact I was thinking about this myself. I don't think we can compare 'love' ever- asking whom Manav loves more is like asking a mother which child does she love more. right now, its just that the Pavitra Bachcha and shravani have become his priority. Why??? Lets see.
1.) Started from when Sachin died- he felt that it happened due to Archana-> due to him. Shravani had clearly said she would commit suicide if forced to abort. His family was completely shattered and his relationship with Archana was coming to an end anyway, so he decided to marry Shrvani to save her honour (which again went into a toss cos of Sachin) and give the baby a good future.
2.) Archana returned and he did not budge from his decision since he felt she was resposible for police complaint and was still angry at her.
3.) Later it came in the open that Archu had nothing to do with police complaint. But by then, Shrvani was in the 4th month, pregnancy couldn't be halted now. Now the matter was that due to his commitment, Shravani had not aborted whereas she had clearly asked him to rethink. It was his fault and his mistake, and Shravani should not be made to suffer bcos of HIS mistake- by being forced to abort by her Dad and maybe even lose her own life. So he did what a conscientious and resposible man would do- he kept his commitment- with the understanding that his and Archana's relationship had broken out bcos of THEIR OWN FLAWS- communication gap, not trusting each other, misunderstandings- Shravani should not be made to suffer bcos of them, especially when she had clearly asked him to rethink before. Also, his whole family especially his Mom wants the child since it is Sachin's last nishani.
4.) Of course in all this he felt terribly guilty that he is being unfair to Archana and breaking vows made in front of God, and so we got to see his frustration, anger, depression, fears etc. To save Shravani and her baby, he himself became a sinner and he knows it. The sad fact is, Ekta and her creatves made him very weak. We never go to see that his love for Archu makes him think of alternatives to not marry Shravani yet save her and the baby and provide them support in a proper manner. Hence my anger at the creatives.