The sooner you can accept your hair loss, the better off you'll be. Trust me. The last thing you want is to become neurotic about it, girls will pick up on your insecurity and that's a major turn-off. If you've lost enough hair you can't hide it, my recommendation is to go ahead and shave your head. It'll feel weird at first because you're not used to seeing yourself like that, but eventually you'll learn to love it. I recommend incorporating some facial hair into the mix, as I think it helps to balance out the look.
By the time you notice you're losing your hair, you've already lost a lot of it. This makes for an uphill battle if you decide to start treating it. So let me tell you what your options are:
1.) Minoxidil/Rogaine: This shit was originally intended to treat high blood pressure. During its testing phase, they discovered it produced an unexpected side effect of stimulating hair growth in some patients. It is supposedly more effective at helping you to keep the hair you have than growing back what you've lost. That's why it's imperative you start using it as soon as you notice you're losing your hair. If you ever stop using it, your hair will start falling out again. Supposedly, some guys have had success using this stuff (though I haven't known any personally) but for me, it was just a waste of time and money.
2.) Finasteride/Propecia: Stay the fuck away from this shit, seriously. You may be tempted to take a pill to try and prevent hair loss as opposed to rubbing Rogaine all over your scalp, but this stuff can have some horrible sexual side effects including E.D. I'd never had any issue getting or keeping an erection until after I taken Propecia for a week. I lost a notch because of this crap and immediately stopped taking it. Thankfully for me, everything went back to normal after I got off it, but some guys have reported having permanent side effects. Google it. The stories will give you fucking nightmares.
3.) Creative haircut/styling: If your hairline has receded, you can grow out your bangs to help conceal it. Use good judgment on whether or not this option is appropriate for you; if your hairline has already retreated too far toward the back of your head, give it up. For a little thinning at the crown, you can grow out your hair on top to help style it over the bald spot. Whatever you do, don't attempt a full combover.
4.) Hats/Toupees: You can wear hats to hide your baldness, but eventually someone will ask you "Why do you always wear a hat?" There's only so many times you can say "Because I feel like it" before people start putting two-and-two together. Also, you'd be surprised how many places look down on you for wearing hats indoors...EVEN IN 2016! I was told I couldn't enter a Vegas club until I took off my hat. Unbelievable, right? We live in an age where I'm supposed to accept because fucking Bruce Jenner thinks he's a woman that he's a woman, but wearing a hat indoors is STILL frowned upon. Makes perfect sense. Plus, what are you going to do if you meet some girl, run some game and she wants to hook up? Are you going to leave your hat on in the sack? Eventually, she's going to see you without your hat on and it may be more of a letdown if she thought you would've had more hair and don't. You might as well just come out with it from the get-go.
https://www.youtube.com/watch?v=IVe4_SPLFJA - (Larry David on Being Bald)
5.) Hair Transplant: These cost entirely too much to be a practical solution for most men. Even if you can afford one, despite the doctor's sales pitch trying to convince you how great you'll look, it still won't be as good as natural hair. Here's a clip of Joe Rogan talking about the three hair transplants he underwent and how he now regrets it.
https://www.youtube.com/watch?v=ktGnSBw9688 - (Joe Rogan on Dealing with Balding)
6.) Head shaving: After fighting it tooth-and-nail, you finally understand resistance is futile and you might as well shave your head. You realize just how much time, money, effort and energy you've wasted worrying about this shit. You could've been approaching women and developing your game, worked out and improved your strength and stamina, read books and learned new skills, etc. Anything would've been better than standing in front of the mirror stressing out over nothing. Life's too fucking short and truthfully, it won't affect your sex life nearly as much as you fear it will. In fact, I've been far more successful with girls after shaving my head than I ever was with a full head of hair.
https://www.youtube.com/watch?v=AD-E2B5GfI8 - (Bald to Badass in Two Easy Steps)