Buying a house and controlling MIL

So we have been searching for a house for months now and it has been a struggle. My MIL thinks she can take charge and it has caused various arguments between me and partner. She would have us live in a dump if it was round the corner from her house. We have been looking at houses outside of the town she lives and she says my partner is disowning her and that she will never see us even though she could easily drive to us!(these houses are about a 15 minute drive). She rings up estate agents and goes and views houses without asking if we even like them etc and has just been a pain from the start! Anyways her and my partner viewed one last week in the town she lives (I was working so couldn’t go) - we put offer in and got accepted but now I just feel like I don’t even want it because she’s viewed it first and it’s in the town she wants us to be in. I probably sound really immature but she has caused so many problems from the beginning me and my partner have been on the verge of splitting up over it. the house looks lovely and I trust my partners judgment (I will be viewing it on Monday) but I just don’t feel like I can get excited about this house because she so desperately wants us to live there and has kicked up such a fuss about us having to live near her. I just feel like now I don’t even want to live in the same town as her because of how she’s been! Am I being stupid??