I definitely understand what you mean, I think you should add new stitches to give it more length and variaty so you aren’t just repeatedly doing sc. However many rows you have of sc, remember and do the next ones in how many new stitches you want and at the end of the blanlet repeat the sc rows. By then it’ll already be a lot and would just need the sc and hopefully seeing how close you are will keep you motivated to finish it (that’s what happens to me) you also could work on something else then go back to it or just work on it when you feel/want to. Personaly when I do that I barely get anything done and take a long break from it as compared to doing it whenever I feel like it and doing more and taking not as long breaks then I would if I forced it
Here’s an amazing post that I believe works for everyone that can hopefully help you give motivation