Teenagers are still children. There is a reason the law is the way it is. They do not have the skills and experience to safely make those sorts of decisions. The feelings you have about it all now are entirely valid and justified in my opinion.
The law is very much an arbritary line in the sand, without getting into too much of a sorites paradox, were you so different a person five minutes before the birthday which took you over that line than you were five minutes after?
and were your classmates all of equal emotional maturity when they crossed the magical line?
Those laws are possibly based on where a society customarily judged that women were ready for marriage at the time when the law was enacted - and they vary widely in age over quite short geographical distances, even in Europe (between 13 years (Spain) and I forget whether it is 18 years or 21 years in Malta). Over approximately half of Europe, including Germany, the age of consent is 14 years.
The much publicised case from a couple of years back, of a school teacher from a church school eloping to France with his 15 year old pupil is interesting from the legal precedent which it demonstrates - they were guilty of no crime in France (where the age of consent is 15) incidentally, I think the young woman was worth more than ten of him...
Would the British state be equally obliging to, for example Saudi authorities, regarding the arrest and deportation of a woman who they claimed ownership of, being seen out in London with a male who was not her husband or brother (classified as adultery under saudi law and punishable by death...)?
I'm not going to completely rule out the possibility of consensual and non abusive relationship with a big age gap - but I'm not hopeful of finding one either.
I think that within reasonable bounds (I'm certainly not going to condone a 52 year old male having sex with a 9 year old girl, even though over 1 billion of the Earth's population see no problem with that), that it is the the behaviours within a relationship which are far more subject to questioning than an arbritary age, and let's not forget that we can feel conned and abused at any age.