@Elderflower80s - You said in your last post: In all honesty I don’t know whether I can see myself happy not living together as the time we get together is just a couple of hours 9-11pm after my kids are asleep when we’re both tired. This is because I’m sole parent of my kids. But I do see that this doesn’t mean that living together is the right thing either.
So eleven days ago, you were only thinking of moving in together ( according to your last post), but were having all sorts of problems with neither of your boys being happy that their parent had another partner, which was causing a number of difficulties. You admit you have been pushing forward this all the way through, but your Partner was keen to leave it for a longer spell of time due to the kids reactions and not yet ready for blending in a 'living together' arrangement.
But here we are only 11 days later and you have apparently bought the house, in spite of the fact that the advice was against doing this yet, on your previous post. So which is true? Have you actually bought the house ( signed and sealed) or are you actually still in the process? You don't just 'buy' a house in 11 days from start to finish.
I agree with others that it is much too much too soon. Yes - you are allowed to have another relationship, but your kids should also be important to you and for both your Son and step-son it is clearly too much too soon.
If you haven't yet bought the house, please don't. Your partner is right that you can still have a relationship, just not living together yet.
If you have already got in too far to get out of the house purchase, you do realise that you will be damaging both the boys and their relationship, problems will be endless and it could be quite likely that you will end up as a single parent again in a few years time.
I can't believe that you are so selfish that you are pushing this through, in spite of how your kids AND your partner feel. It's a recipe for disaster