She isn't worth thinking about. Many study in their 30s, 40s - who gives a shit? How old was this 'woman'?
Overthinkers and people pleasers tend to write long messages, and those that take a genuine interest. It's really hard to be brief when your mind is like a maze - I understand. I quite like longer messages, because it shows you took the time to take an interest in replying - but also it can show you add information that is completely irrelevant, and that shows a tendency to over explain yourself (people pleasing), when really, we don't owe anyone shit.
Despite this essay (lol - showing an interest), when I text my friend, I no longer send him MASSIVE essays LOL, so I am definitely getting better at it.
This woman is of no relevance to you. You literally don't know her. She's a stranger. Don't let it get to you. The less you expect of people, the less you will feel rejected. Rejection is normal in life, and no one owes you an explanation unless you have plans with that person and you're in an official relationship or they are your friend with plans made. I know this is hard to accept, but it's true.
The sooner you learn to lower your expectations, the sooner you will feel less overwhelmed. Your expectations of people are likely high. Lower it. It works wonders. It does take time to practise, but you'll get there
Killing yourself over someone rejecting you isn't worth it. You're 27, there will be plenty of opportunities in the future. Is there a reason you're using an app? Why not meet a woman in a normal way? Approach, make conversation. Everyone seems to be on apps these days and no one talks to anyone, that doesn't help social skills or confidence.
Get yourself out there and go meet some women. Go to a bar? A club? A group meet up? You mentioned you're studying so there must be somewhere you're doing that?
Sometimes a different perspective can help, rather than our own overwhelmed perspective.
Please try to remind yourself rejection is part of life. It's part of growing and gaining confidence, you can't expect every single woman to want to meet/talk to you, that isn't reality, everyone is different, we all have different standards - albeit, some shallow yes, but fuck them, you don't need those types in your life so don't look for them.
If a woman isn't engaging in conversation with you, it could be one of two reasons, 1) she's not interested 2) she's incredibly shy (some are, some aren't - like men), but you'll figure it out.. one word answers is pretty obvious, and don't push it if she isn't responding/evidently isn't interested. Take an interest in her, and see if she does/has already. Some weirdly, won't make the first move, but you could try that.
It'll get easier, I promise. Give it time. You're literally 27. A hard age. 20s are rough, it gets easier
Find a common interest and talk about it. Break the ice
Oh and one more thing.. never settle. Ever. You know what you look for in a partner, so go for that (I'm not talking about looks - looks are important, but also not the most important part - anyone can be attractive, literally anyone).
If anyone ever shows signs of any red flags you're not comfortable with, just fucking run. Don't explain. Run.
Remember, you don't owe anyone shit, unless you're in a long term (NOT abusive relationship - you can run from that whenever you're able to - no need to give a reason) relationship. What I'm trying to say is, don't let people make you explain yourself (red fucking flag)
Shit, this got long fast. OK, I really enjoy helping others, it's one of my passions.
I hope this helped a bit. Also ok if not