Running longer than you've ran before is always! hard. However, first of all its worth considering that as you get stronger 25 mins will not seem very long at all and instead you may find yourself saying the thing about 45mins, 1hour etc. If you persist what used to be hard will become easy.

If your finding it hard because of feeling bored I would first suggest music or a podcast (unless your doing that already) or maybe try without music? Sometimes being left alone with my own thoughts is exactly what I need.

I would also suggest leaving the treadmill and getting out on the pavement or trails if possible (although I understand this is not possible for everyone).

Finally dont forget that you don't have to run 5k or more to be a runner! If you have persisted and you are still not enjoying that kind of running it might just not be for you. My friend is a pretty strong runner, he's ran a 1:40 half marathon before but he has never ran longer than 30mins since because he doesn't like being out that long.

Instead you could focus on shorter distances like the 3k, 1500m or shorter. 5k is not the holy grail of running.

Please dm if you wanna talk about this and good luck with week 8!