Ask a mate to set you up? I think the sort of girls you seem into probably aren't the sort of person you can easily pull. Basically, you're not into sluts. So if you're stocky/muscular and tall and "exotic looking" (does that just mean tanned) then I don't think you should worry about your looks, and considering that is the primary thing that attracts people, the only problem I can think of is that you're not in the right social circles or in the right environments to meet these girls that you're attracted to.
If you know a girl and like her, ask her out for a coffee or something, or ask to grab lunch somewhere. If things go well, you'll progress into a relationship, if not then set your sights on someone else. This would be much more effective than approaching them in a bar.
Tbh, I get the feeling you meet these Towie cougar types by being in the right places to meet them. You say you like girls who prefer staying in over partying but are you like that yourself. Because even though people say "opposites attract", I think that's not usually the case.
Presumably you know all this. All I can really say is that if you don't have to work on your looks, you don't have much of a challenge. I see so many threads on TSR with people saying "I'm ugly" or "I'm fat" or whatever, and whatever people may like to believe, looks count for A LOT.
So try to meet up with the sort of girl you like and show her that you're the sort of guy she should be into. I'd be interested to know how old you are though. Presumably at least 17 or so considering your height. If you're in your early twenties like 23 or something, I'll take this question more seriously, but if you're 19 then I'm sorry, but while it sucks that you don't have a girlfriend you just need patience, and maybe a bit more of a can-do, active attitude. You'll probably meet the girl who ticks your boxes and you'll probably find you tick her boxes, but I think the only advice I can give is to focus on the latter.
But yeah, be proactive but also have patience. You need to look for the right person in order to find them, but you also need to accept that this will take time. Don't worry about it though, I'm sure it'll work out.