Up to you really. A foreign degree can be pretty hit and miss in terms of giving you an advantage in Pakistan, some people get it and some don't. I know people who couldn't find jobs two years after coming back. A LUMS grad in Pakistan (do NOT, however, go to IBA. That place is full of poorly socialised idiots) would be much more desirable for most employers than someone who studied abroad unless they went to a top notch school (Ivies, Stanford, MIT, Oxbridge, LSE and Imperial).
The job situation is pretty dire, at least in technical fields unless you're willing to settle for something ridiculous like 15 grands a month because there's very few players in that sector. The influx of Chinese money has also made things worse because they bring their own people from China so there's very few high end jobs, at least for engineers. To give you an example, back in the early 2000s, when Nokia and Ericsson supplied most of Ufone/Telenor/Mobilink's networking equipment, the vendors (Nokia/Ericsson) were staffed almost entirely by Pakistanis except for very high ranking positions like Country Head. They have now been driven out by Huawei and ZTE who fill most technical positions with Chinese engineers, only hiring Pakistanis for low end engineering work and as technicians etc. As CPEC picks up pace, this pattern will repeat in most other sectors(already started in the power sector to some extent) so competition for decent jobs will be even fiercer.
It was stupid on my part to want to "develop Pakistan" but I was lucky to learn my lesson pretty quickly after returning. As for the independence/loneliness business, it depends from person to person. I, for instance, am pretty withdrawn and get easily annoyed if my family calls me more than once every three or four days. At home, I ate in my room because I just prefer being by myself so the independence and freedom suits me. A friend from university, on the other hand, used to go to Pakistan twice a year during our two week Easter and Christmas break because he had a very different relationship with his family, my point being that it depends on the person. This is something you have to decide for yourself based on your own preferences.