I always found it easier to write it down. That way they can’t stop you before everything is said. It’s not ideal for everyone, but it works for me. I could see a parent trying to say that problems can be handled within the family, something like “you know you can always talk to us, no need to get formal counseling”, so be prepared. They aren’t necessarily trying to talk you out of it but getting therapy can seem extreme to some people. They may worry about your chances with future jobs or adoption or even legal troubles. In those instances you may be asked about past psychiatric services. But “family” or youth counseling is very common and shouldn’t affect any of those. Just be aware that your parents may have these concerns especially if you are prescribed anything. Good luck!