Impure thoughts and aceptance of Prayers & Fasts

Salaam everyone,

I am a single guy in his late 20s. I've managed to stay away from all major sins my entire life and I've never been in any relationship. I'm pretty religious but lately I've found it very difficult. I've been living alone for the last 5 years, but recently I moved to the west for my masters program and the environment here is very difficult. Back home the opportunities to mingle with the opposite sex were minimal, and that coupled with my abstinence kept me away from immoral acts. But over here it's so damn easy. Living on my own has take its toll and now I feel so desperate for company. I have a few dating apps on my phone and I've started seeing people.

As a result of all this my mind always thinks about sexual activities. As soon as I get back to my place, it kicks in. Can't even stop these thoughts while I pray and I had a very difficult Ramadan.

Now, my biggest problem is my pre-ejaculation fluid. It gets discharged far too easily. Even a thought for a few seconds gets it flowing. I try my best to clean up, but most of the times I notice a wet discharge while I'm praying. And this happens after I cleaned up only a few minutes ago. I'm very certain that none of my prayers are being accepted. I have doubts over the acceptance of my fasts as well.

I'm simply unable to control my thoughts and my mind. I've noticed that I don't get these thoughts when I'm occupied with something. But when I'm working on something all alone, it almost always happens that I stop doing that work and start indulging in immoral thoughts and actions (being on dating apps/sites). I am ashamed of the person I've become, but I didn't have any such issues until a couple of years ago.

Surprisingly, I don't watch porn and I don't masturbate, like at all.

Now many will suggest that I get married, which I will in a year or so. But I need to fix myself before I get to that point. No one knows about these issues that I have been dealing with. I feel like such a loser.

I would very much appreciate some help/advice on the following:
1. How can I deal with my pre-ejaculation fluid? Should I go visit a doctor? Or is there some herbal remedy that I can try?
2. How can I control my thoughts? I am a student and I have to spend a lot of time self-studying. This becomes a trigger for me. As soon as I'm alone, my dirty habits/thoughts take over me.