To find people that won't run off, you will need to join a long and experienced pvming clan, However... they will need to trust you somehow which is why you need to stay with them and earn trust over time, don't think this is possible instantaneously as many may run off if they get a sigil.
Check out this website, so you can get an idea of if the guy your teaming with may have been a scammer in the past http://rsjustice.com/
I have trust issues when it comes to other scapers, so I always corp with 5manffa cc, you don't split loots at all, so you can't really get ripped off that way...
And all loot you get is yours to keep