With regards to the original question, no... I don't feel envy or jealousy. But, I think that's because I am extremely content with the way my life has turned out. I have a good friend who is mentally ill and living on disability, and no matter how hard she tries to get ahead, she never succeeds. She will always be poor, she will always be sharing an apartment, and she will always be struggling to make ends meet. Vacations are not in the cards for her. So she does feel envy and jealousy sometimes, and sometimes it's directed at me because of the various advantages I've enjoyed in life (good health, good marriage, good finances, etc). I understand completely where she's coming from.
I have other friends, too, who are struggling financially. So, while I enjoy reading about other people's vacations, my husband and I typically only post three or four pics of ours. We might change the Facebook banner or profile pic. But that's it. As I said, I'm not a diarist, so it's not like I'm giving anything up here.
Also, count us in as another couple who are happily counting down the days to retirement (three years!) so we can travel the world. At the moment, we take about three vacations a year, and every one is eagerly anticipated and very much enjoyed. I don't see us ever finding travel a "hassle", unless something terrible happens to our health.
My mom is over seventy, and she's taking herself off for a month to Ireland and then Munich, in a few weeks. She's an enthusiastic traveller, and the only thing that holds her back is money (or rather, the lack thereof).