lilo10

I am about to finish my master this semester and i was accepted in the PHD program in the same university for the spring semester. The problem is it is not one of the top university and I am really still thinking if I should go for it or not. I have not applied to other universities yet but i am afraid if i passed this opportunity i will not get accepted anywhere else, I am an international student and i need to get a research assistantship to study in the US. My advisor talked to me and he is willing to offer me funding and a scholarship but he wants me to make a decision in the next two day. I was thinking to start the program next semester and apply for other universities in the mean time and if i was accepted I will transfer. I do not know if I should tell my advisor about these plans as he might retract his offer, but I think I should be honest. What should i do????