Hi,
As someone who spent a fair portion of my time on trains travelling from university, to home and back again, I know sometimes it can be tiring, and with strikes, and delays, it can be a nightmare to navigate.
If you can't get back home, you don't necessarily have to worry about booking a hotel. A lot of universities will have accommodation for commuting students, which can cost as little as £20 a night.
Second year can seem a bit more daunting initially, but it's not necessarily noticeable, as it doesn't actually feel any different to first year. From my own experience, there didn't feel like as much of a shift up as everyone claims there is.
One advantage of your commute is you'll have more but less time than your fellow students. Just because you're travelling, doesn't mean you can't spend your time wisely. If you've got a 5 minute walk to uni, you might have more time in bed, but if you're travelling, you have extra time to study, or make notes, or even just plan out your day.
It can be not always worth it, but it can be cheaper in the long run, and if you are travelling 3-5 times a week, a railcard or a bus pass is always worth the investment and means you're saving more money overall.
Hope this helps,
Andrew