I understand that feeling very well my friend.
My Advice is: Don't force yourself into reading/playing it, just wait until you are in the reading mood (like in the mood to read a good book) get some coffee, maybe some snacks, get comfortable and be happy because you are doing something you like.
If you think you are never on the mood to read the VN you are currently reading/playing, then maybe you should think to yourself if it is really your type of story, if you are really enjoying, and if that's the case, then move on to another one and so on.
That's what I think, hope it helps, even if a little bit.
Edit: lol Makudomi did a pretty good job explaining the same, just as I was typing this welp