The main question would be if you want to get diagnosed. If you're happy as you are now and it isn't affecting your life significantly, there's probably no real need to see a doctor. If you feel like help from a doctor/psychologist would improve your quality of life, then go for it.
Also, if your friend is a clinical psych, she probably has a much better idea of what a diagnosis would involve and lead to than most of the people on Hexbear, including me.

Getting a professional diagnosis might open up stuff like accommodations or legal protections at your workplace or school.

I'm under the impression that it isn't something you fix but it might help you manage stuff you struggle with.

it would probably be a good idea for you to do some more research yourself on the legal benefits/detriments of a professional diagnosis

one thing to keep in mind about getting a professional diagnosis is that i can be used against you especially if you already fall into other marginalized groups for example in some places trans healthcare may be denied from you because of your autism diagnosis

A good idea to think about is, what would be the aim of seeing a professional?

For example, depending on the diagnosis, maybe some jurisdictions have social programs or protections that you would legally qualify for. You know your situation better than us ('autistic spectrum' can mean anything from major social struggles to a few useful quirks! There are neurologically atypical people I've met with proper diagnoses that neither they nor I suspected).

If there are some things your friend listed which you believe would be useful to change, maybe therapy could be effective for that, or even to help you to foresee some solutions to difficulties before they unfold through day-to-day experience. I don't have experience with therapy so I can't really advise on that. The unfortunate thing about (at least, my) society is that people often consider it rude or offensive to tell a person with social difficulties that they're doing something strange, or they will use subtle social hints to try and be more polite, which means a lot of people with ASD's are never told and don't notice the hints, and find out at age 30 that 'oh, we all just assumed you already knew'. I don't know whether that's more 'frustrating' or 'ironic'.

Late response but don't do it specifically for autism

Autistic people have less rights such as having a lower minimum wage and many countries will deny you a work visa/residency/citizenship if you have an autism diagnosis

In general getting a diagnosis is good though, just not for autism

Ha! Good question. I recently did some reading, and had a conversation with a doctor in my group of friends, and came to think my teenage son might be on the spectrum.

Assuming that, some of his behavior is much easier to understand and accept, also deal with. So I sort of wish someone would have told me earlier, and I have been thinking about asking our therapist specifically for the diagnosis on the basis of which he is in therapy .

But then again, what’s the point? He is fully functional, only special in some specific ways. With all the difficulties to fit in, there’s no reason to assume he won’t be able to get a job and manage his life.

What remains is, he, like everyone else, has to deal with his specific personality and coinages. Some come from within him, others come from the circumstances he grows up with. We are working on that with or without a diagnosis.

Having a diagnosis might help understand some things happening, but there’s also the risk of using that as an excuse for everything, or letting oneself identify by it.

So, after thinking about this for a few weeks I now think I don’t care about a diagnosis, unless he needs one to get some specific help. For living the live, the named diagnosis is too much of a risk to be a burden.