Should I get limb-lengthening surgery?

del

Maybe work on other traits that make you feel secure.  Wrestling, boxing, gym. Singing, stand-up comedy, improv. Personal stylist. Less invasive and risky. I do know from studies that on average taller is an advantage in many scenarios. But you aint average. 

Tbh, it does sound like you're insecure about this and its making you needy. Needy men are unattractive. Be truly secure with yourself as a person first and that success will follow. 

Height is only one genetic indicator to a woman that you would make a good partner. It's a sign that you can be a protector. But your personality is far more important here. If you're acting needy and requiring validation and acting in a very insincere manner towards life, you'll continue to fail in dating. 

Honestly, just religiously workout like 5-6 times a week for six months. Most of this sounds like it's stemming from insecurity. For reference... I'm shorter than you and have never felt disadvantaged at work. With dating, yah, women typically prefer the same height or taller, but that's not all of them and I've had a bit of success in this area. 

The gist of it is to just not be defined by your height. The way to do that? First, tend to your physique, your wardrobe, and be well kept. Second, get far more comfortable chatting with strangers. Chatting with someone at a club, bar or through connections/parties is very, very similar to networking, the more you do it, the better you get. You'll learn how to open conversations, how to rea cues and how to take rejection. Finally, find hobbies or things to define you. It could be coffee, rock climbing, boxing, reading, running, anything. And then find folks that share that hobby.

be like mighty mouse - pick up MMA

Dude, no. Just no. It's not worth it. All the social media stories you see of people who got it were comped. I know a short guy (he was 5'3) who went and got this stupid surgery and regrets it. 

1. the 6-9mos recovery is the best case scenario for you just being able to walk. It's closer to 2 years before you're truly "healed" and even then most folks will still have some issues (mostly pain) because, surprise surprise, that surgery is extremely traumatic for your bones.
2. even if you get the upper max of 3 inches - I hate to break it to you - you're still shorter than the average male. So you pay that money, opportunity cost of losing all that time, and you're still not even average height.
3. your body will take years beyond just the regular healing to feel anywhere close to "normal". Your proportions are off and your body has adjusted to being X height. Your body will still want to walk, run, and generally move around as if it were still X height whereas it'll now by X+y height. It makes you seem clumsier and move less fluidly which, if being short made you insecure, still being short + now being a clutz will do even moreso.
4. blaming "missing out" on experiences because of your height is BS. I used to row and we had a coxswain (little guy who rides at the front of the boat) who was 5'5 and pulled bitches better than half the heavyweights because he would make you lose a kidney from laughing so hard. I also know a 5'6 wrestler whose GF is 6'1. Dude is jacked, funny, and has a world of confidence because he will fuck a brother up if they try to stunt on him for being short. The reason you missed out is because you have this chip on your shoulder and haven't taken steps to improve other areas of your personality to make up for this self-perceived "gap". 

You need to learn to love yourself and how to develop your own personality before worrying about cosmetic surgery unless you have some brutal disfigurement like burns all over your face from being trapped in a fire. 5'4 is short sure, but I've met plenty of Mexican/South American guys right around that size who seem to have done just fine for themselves (date normally, have cute wives, etc.). It's all about perspective and being realistic with your expectations.