This would depend on two things. One- the aro person’s willingness to be in a QPR or something similar and two- how quickly my alloromantic friend falls in love. See, if it was my best friend, who has a tendency to develop crushes really quickly, I would discourage her from pursuing a relationship with them but if it was one of my friends who don’t fall in love as quickly then I would tell them to talk to the aro person and see if they’re open to some kind of relationship. In the end, that would also be my advice to someone like my best friend, but I’d also be like ‘it’s prolly not a good idea’ as well.