Suitable. There is no age limit between friends, no matter how old they are, they can become friends, so it is appropriate to make friends at the age of 35 and 45, for example, forgetting to make friends, even if the two people are very different in age. As long as friends hit it off, understand each other and agree on their views, it doesn't matter how different they are. Age is not a problem, and height is not a distance.