I was there not too long ago, I'm still in education actually, so I understand exactly what you are going through. I pray that when I have children, my understanding remains unchanged.
So you're in school, now for the most part things are going to be quite hard but there is just one thing which will keep you going and that is "education is the pathway to wealth and therefore the pathway to marriage". All wealth is given by Allah, and in this day and age, education is one way of attaining it.
When I was in school and my parents went to work, they would tell me that in the same way my father is being rewarded for providing for his family, I am being rewarded for working hard to get to that point.
When I got to the age (16) where I wanted to be married, people would of course tell me "You're too young", "Focus on your studies", "You're not mature". Now this was years ago but I still remember the rage I felt when I heard these kind of words, I broke doors, furniture, walls even. That is how a 16 year old with "more" uncontrollable feelings than the average person reacts when you tell them there's nothing that can be done for them until several years time. Those days are long gone now though and I have settled down now, instead I just keep the end goal in mind and it's solution. Any time I'm feeling sad or depressed, I tell myself "End goal - become financially stable. Pathway - work hard." it sounds very simple, but when my mind is scattered then it helps to set me back on track and get myself together.
Right now, even though it's hard, for you the outlook is good, you have a great chance to get to a financially stable point. Of course there is the difficulty of not being married.
When you're in school or education and you aren't married it is very tough, it is still tough for me. The battle has lasted 9 years as of today in my case. In those 9 years, I have not come up with any solution to remain chaste, people say this and that. I have heard it all, several times even. If anyone finds something which works, let us know. I have not found a solution in 9 years.
The best we can do is repent, keep the end goal in mind and keep working hard towards it.
I can offer practical help in the form of free academic assistance in any of the sciences (maths, physics, chemistry and biology), if you or anyone reading this requires help then just drop me a private message.