You are brave to continue to throw money at one stock. I mean it’s great if you guess correct, but if not?
Here’s my 2cents. If you are going to have a big swing up , it won’t matter if you have 5k 10k or 15k shares. You will find the only difference will be do you win a lot or win A LOT.. Adding more shares one the way down I don’t think is a winning proposition. At least you should wait for a good earnings report before adding more.
Regarding your friend.. Unless they asked you for an opinion, don’t give it. You get nothing in return at best, and only have downside to give your opinion on something that they probably already made their mind up on. Most people really don’t want others to rain on their financial decision. Short of an anonymous blog, I wouldn’t do this to someone in person I knew well.