Am in a similar boat, most of my trusted friends who have given me good advice over time and could be good co-founders are not in the IT/CS area. ( What to do, I am from Mechanical/Industrial Engineering background)

The two friends who are extremely capable in this area of IT/CS, one of whom has a high interest coming on board with my start up, both have heavy constraints with family, requirement for financial stability and visa regulations.

In this case, I would disagree with PG' statement that not having friends as co-founders is a mark of no-confidence.