As much as I want Shravan to fall in love first, I think it will be Suman because she is so self-aware and emotionally intelligent but she will be in denial. Shravan on the other hand, will be completely unaware of his feelings until something major happens or jealousy and then he'll be in denial. Even if they confess or realize at different times, I'd like to see them fall at the same time.
Yeah, I think Shravan's lying habit will cost him big in the future. Because of this habit, Suman will never be able to fully trust him and may become cause of MU