Yes, it can make you psychology weaker, but not for all the cases.

As Chaurey said, being isolated or being free can also make you confident about yourself and you can also realize your own potential. Most of the guys, who were born and raised with in Kathmandu valley always raised within their comfort zone. They always have their parents for advice, lodging, fooding and also for monetary cases. Once you come to states you lose your entire comfort zone, and had to realize that now you are the only one who has to decide for your future. 

I don’t try to be sexist, but I believe specially girls will have hard time over here in US if they don’t have any immediate cousins over here for advice.  May be this is the reason, they start to be in “live in relationship” (Most controversial statement, may be this is the reason, or may be the age or freedom they are getting when they are in US. I am thinking in this way as I have seen so shy and reserved girls are also in”live in relationship”, and I would have never imagine, they will even have boyfriend if they were in Nepal”)

I also think once you are here in US, Darwin’s “Survival Rules of Fittest” will start to apply. So most of the time, to survive here in this condition, you will become stronger mentally and psychologically.

For me I will say, I have become psychologically weaker on only one case, which I will try to describe by single line of Deep Shrestha song

डांडापारिको घामलाई हेर्छु, आमा र बाबा सम्झीरहन्छु................. डांडापारिको घामलाई हेर्छु, आमा र बाबा सम्झीरहन्छ..................