I don't post or stop by as much as I used to, but I felt like doing so today and then felt the need to give my two cents about your comments.
You should never have a bad day just because you're 178 CM. As many of you know,I'm 178-179, and have been to most of Northern Europe and Croatia. I'm also a citizen of one of the Northern European countries. It's been my expirience that at 178-179 CM, there are indeed many ways to more than compensate for what can sometimes be an average or barely bellow average height. Good facial aesthetics go a long way. If you lack those, just being in really good shape, goes a VERY long way, and that's totally within your control.
I used to have "bad days" because of my 178-179 height, especially since a good bit of my family is 190+, but it doesn't bother me anymore because I realized that I have so many other things going for me. I don't particularly like my height, and it's nowhere near my ideal, but people still respect me for the person I am, and I can still be good looking, genuinely confident, and "respectable" at this height, even to 190 CM people.
In the last year and a half, I have studied in multiple countries, obtained scholarships to do so, gotten into really good physical shape (which caused really good facial aesthetics I didn't even know I had to shine through), I've learned salsa dancing (I like Latin gals) and I've gotten pretty good at playing the guitar. People of all heights respect me and I've learned to judge people much more by their attitudes, character, drive, and accomplishments than by their heights. I agree that taller looks better, but it's by no means the only way to look good and I don't think people care nearly as much as you seem to think (and I too seemed to think) they do.
I don't see why 178 isn't a "respectable" height. I see people who are a lot more successful in life than I am, in their early 20's (also my age range), and not as good looking, at only 174-175ish in height.
Your character makes MUCH more difference than anything else in life including height. Go explore the world and enjoy life. The super successful 174-175 guys I mentioned are all ridiculously charismatic and charming. But many of them weren't naturally this way. They learnt to be and live great lives as the result of their efforts. Hang around these types of people and learn from them. And trust me that, at 178, your height shouldn't be an issue.
If you dislike your height (I still dislike my height as I've stated before), and you can safely change it, and the pain and expense is worth it to you, then by all means go for it. I don't see why not. You only have one life so why not live it in the body of your dreams. But I disagree that 178 isn't a respectable height and I find it sad that one can have bad days just because of being 178. I say this fully regretting that I too once had many depressed/bad days because of my height, and I wish I could get that time back. But, for me, I have decided not to look back too much, and instead focus on the things that are easier to work on, and life has felt so, so much better. I only say this because I don't want you to lose so much of your youth being depressed about your height like I did. I'm still young though and I'm glad I'm in a better place. Hopefully you'll get there too. I thought the only solution was LL and now I see that it's not. I might still do LL because I'd like to live my one life at my ideal height (also 185-188) and my proportions can definitely handle it, but it's not a necessity anymore and is far from first on my priority list.
There's so much to enjoy in life. Don't let dissatisfaction with your 178cm height keep you from it. You'll really regret it one day if you do. Wishing you well mate.