- We need nuclear energy as also all renenwable resources we can which includes solar/wind etc. Clearly India has huge shortage of power and this needs to be attacked urgently. - US pressure is no doubt a reason but also pipeline going through Pakistan is probably bigger one. Who know for sure.. - That is always a consideration. Though chances are slight unless India explodes a nuclear device. But India can bank supplies and if we have to increase our economic might quickly enough, we have to go with this slight risk. - No, we do not have to agree to US demands. Any country in NSG can supply fuel(which includes Russia and other countries). I think once India becomes a member, it will not be very easy to remove it.
My feeling is that we need to get as much energy and as fast as possible without relying on oil. That can be a bigger problem in future than worrying about some countries stopping nuclear fuel supply. Though we should have some backup plan for sure..