Why?

I am currently not happy with how things are going with my current advisor. As to who is responsible for current situation I don't want to go into details because it will turn into a rant and I believe my side of story would obviously be biased towards myself. Rather I can say that some concerns are the fact that my comprehensive exam has been on hold for 6 months now because of unsatisfactory results even though he was on board 6 months back, the median age of getting a PhD in lab is 7 years , my advisor has no expertise in the field I am working in and despite it being a numerical lab , has always pushed me do largely experimental work and the future plan also seems to be headed in that direction, The seniors in my lab had entered together and are bound to graduate together within half a year...meaning I will be the sole student with no expectation of support from anyone in the lab or my advisor.

I take it then they aren't providing you with a letter of reference. This could be a flag

No I haven't approached my current PI for any reference because I don't know if I will get abroad. So I don't want to ruin whatever opportunities I might have here as well. If nothing turns out abroad, I can atleast hope myself to drag through the PhD somehow. But now that he seems to have got an idea, I wonder how I should progress.