Bee, we have also been going since 1983 as well, our first visit there (and every year since).
You look very familiar, even though we have all changed over the years, we are sure we have seen you there.
Forget Thomson's, and go independently, via Easy Jet or one of the others.
Lots of places to stay there that welcome singles.
Get a quote from all airlines for both a return trip, and also two separate single journeys.
Thomson's are known for having cheaper (two x single) flights, than a return for example,
There are lots of studio apartments around the older area, that would suit you if you can't book your first choice.
(By the way, they were still being rented out this July), Jimbo's idea is sound as well.
If you need any assistance a few of us including Lesley (who lives there), can put you in touch with various options.
Tony & Linda