How can you truly tell if you have a friendship of virtue according to Aristotle?

I have no real former experience with philosophy and may come across and incredibly uninformed in the following that I am about to write, so feel free to tell me that if it holds true.

I recently watched a very good video essay that delved into the topics of the three types of friendship that you can have (utility, pleasure and virtue/friendship of the good). After a while of reflecting on it and thinking about the people I consider to be my friends, I really just haven’t been able to fully understand how you can know what type of friendship you have.

A friendship of virtue comes from wanting the good of your friend, and wanting to see them flourish (and them wanting the same for you), but for a friendship to not be based on pleasure, it seems to me that you need to almost be completely selfless.

I’ll put it into an example, let’s say my friend wants some advice from me, and I give the best advice I can to benefit them:

- This satisfies my selfless desire for them to succeed and be happy because I truly see the good of their character

- But also satisfies my selfish desire to remain friends with them so that we can share good times together, and could additionally be selfish in the sense that they will appreciate and value me more now (and being accepted and validated is something humans tend to want)

How can it be possible to identify that you have a friendship of virtue when you aren’t fully virtuous?

It seems to me there’s no way to tell that your main motive for being friends for someone is to see them flourish as a person when the exact same motive can so easily be clouded by selfish thoughts.

I feel that even if I had a friendship of virtue, I would never be able to distinguish it from pleasure, because I objectively enjoy the fact that I personally get something out of even the friends I want to see succeed the most.

If you have anything to add to this that I’m missing then please tell me. Thank you.

(Also I understand that philosophy isn’t a subject of objective fact, so if anyone wants to take that angle too then go ahead).