I don't think you are being selfish, just thinking of yourself first and whats wrong with looking out for number 1 ?As a wife,mother,sister, daughter or friend how many times can you remember where you came first,not many we usually come last don't we ! As your children grow older you have more time as a couple, on holiday especially. The one time you can enjoy yourself away from everyday life has got to be on holiday and I think thats one of the things I enjoy most, leaving everday life behind.
BTW had a bombshell dropped on us this weekend and it has been very emotional, but now I have been on Arillas.com and read some posts and banter I am feeling a little cheered up !