Hairline is intact, also the crown. The hair is falling in between. No bald males in the family! (Photos)

Thanks for your photos. First you should visit a dermatologist who has also experience in hair loss.
Some medications should be taken like Finesteride or Minoxidil .If the hairloss does not stop than another option can be a hair transplantation.

I recommend a hairtransplant with 1500-2000 grafts behind the frontline for fix the front part.And after than you have to use some long term treatmants to support your thinning hair overall (finasteride,laser cap,prp ,biotin are different options for you )

It apprars you have a form of AGA Finasteride followed by minoxidil followed by laser and PRP are key decisions. See a hair specialist to review options.

It looks like you have diffuse thinning from back to front. You may want to consider some preventative measures such as Finasteride and Minoxidil. 

I would recommend that you seek the advice of a professional in person. You will need somebody to do an in person assessment on your hair loss and then create a restoration plan that is right for you. I would say that you could try some PRP treatments and see what results you get. and Minoxidil and Finasteride are also always great ways to slow down hair loss. But you will be able to get all of your questions answered as well as some peace of mind if you seek out the advice of a specialist in person. 

Most likely you have a variation of MPB but you should be examined to determine the correct diagnosis and treatment. See a dermatologist with experience in hair loss.

Your biggest enemy is the progressive thinning leading to a
balding pattern that is not evident at this point in time. The degree of
thinning that you are experiencing would suggest that you should see a
doctor who most likely will get Bulk Measurements of your hair to
determine the degree of the thinning that you are presently having. If the
diagnosis is early genetic hair loss (the most common cause of hair loss
in young men), then the best treatment would be the drug finasteride which
is highly effective in men of your age and may not only stop the hair loss
but possibly reverse it. If you are developing a more advanced balding
pattern the best test to get will determine the Bulk Measurements of your
hair and this will show, over a one-year time frame, how effective the
treatment will be. Once you know this information, then you and your
doctor need to develop a MASTER PLAN which will define what you need to do
over the years to come.