It is not about wanting good relations with Pakistan or not, it is whether there is a realistic possibility of that. Pakistan is obsessed with Kashmir & there is nothing that India can & is willing to offer Pakistan which Pakistan will find acceptable. End result, no movement.
Pakistanis love to make the argument of central Asia, it simply doesn't interest or enthuse Indians in the way you imagine. In any case, Pakistan's asking price is never going to get paid, so end of story. India may chose a costlier way to go to central Asia through Iran but it can be done. Pakistan though is out of the Indian market, a market that most others find reasonably attractive. That is the crux of the argument. Pakistan offers itself as a transit to somewhere else, a way to "some where else" can be found bypassing Pakistan, India offers...well, India & there is no way around that.