chris_pilgrim wrote: @JR8. how long have you been here in sg b4 you have had enough? ... i have another 23 more months to go and somedays i feel that i'm tipping over
try berwick-upon-tweed ... i would love to retire there

It's not just time in, it's also how time gets spent. And also at what point or stage of your life you're in.
Example: I've done three postings here in SG
-1. 1994/5. Single. Worked in banking. Full on hours. Life was the office.
-2. 2008/10 (?). By now a trailing spouse, but also working from home.
-3. 2013/4 - ? Back once again...
Now if I hadn't have been canned from #1 above, I'm sure I'd have stayed longer. #2/3, I'm pretty much funding being here, off self-employed income from Europe, and SGs not exactly a budget place!

So in some respects the table turns, and I need positive justification to remain here, as almost anywhere else we'd be better off.
I think it's too 3D to express in an objective formula. It's great for (almost) as long as you can make it that way. When you feel the equation has turned, you start to feel it innately in a subtle way that I think you try and deny, or consider as something temporary. Maybe it's like having a 'comfortable' girl/boyfriend for a couple of years, but then the doubts set in slowly, that it's going nowhere, and they're not a keeper....?
[Duration of stay for #1/2 above were not in my remit, but this time #3, it squarely is. 'So, do you feel lucky punk?'.]
23 months to go? Oh, you better not start counting them down

Look for some plus-points and enjoy them to the max, regional cooking, travel...
I recall going through a 'dark-phase' in my previous career of work (12+hrs/days)-sleep-work-sleep. There was nothing to life beyond the office. I vowed to try something new. That was my intentional journey of discovery into something I knew NOTHING about, contemporary art. Looking back it's almost as if I set myself a challenge to try and accept something, that through my naivete I thought foolish if not a lie. 'Busting a lie'? But it didn't turn out like that at all, I really did discover a magnificent epiphany
And again some years later (now a member of the ICA London etc

) the gerbils wheel loomed again. So together with a friend in similar shoes >> training to do SCUBA diving. 10+ years later it's still probably my #1 hobby, and it gets to take me and my wife to some truly amazing places.
So? Perhaps try and find an interest to lose yourself in. Something where there is open-ended opportunity for furtherment. Hey and having good food and travel thrown in makes it fun too
Suddenly, planning how you get to go and dive (or sail, or chill) in Micronesia, or the Gili Islands/ID, (or where ever... just having a project) does tend to alleviate some of the pressures of daily life...
p.s. Berwick on Tweed. LOL! Lovely place. Beautiful wild place. You'd laugh if you knew my connections to that whole coastline...