[hayatokun]

ok

You can use kara/node after the reaction. so ぼくはさびしくなりました。ぼくは一人でいきていくの で or から
this is more of an afterthought: i became lonely... because i live alone. rather than ぼくは一人でいきていくのでぼくはさびしくなれいまし た。-because i live alone i became lonely.
Most texts will tell you to put the kara and node before the result, because it is more gramatically correct. also no tame ni used more before the resulting action...