Why is getting someone interested in a relationship so difficult?

Guys will talk to me a lot in the beginning, ask me out, text me, but nothing ever seems to solidify. I’m disappointed and unsure of what to do. I’m very attractive physically, have a modeling contract, I work out everyday, have a successful career, am very feminine, not arrogant, kind to everyone, don’t put out easily, have a great personality and hobbies, and more. I’m not perfection but I do work very hard on creating a great life for myself. However I am concerned that I can’t keep anyone really interested long term and that’s what I’m looking for. I’ve asked friends and others for input but they say it’s the guys I’m going for and not me.
For reference the only guys who even approach me are tall and attractive and/or rich. I know, that’s a small part of the population. I have broadened my net and still nothing seems to stick.
I know some of the guys I’ve talked to won’t ask me out but they’ll turn around and ask another girl in our social circle on a nice date or something.
Im aware that they might have a lot of options, but so do I. And I’m way up there on the attractiveness and desirability scale so it shouldn’t be this hard.
If they’re not talking to me or asking me out, they’re staring or checking me out.
So nothing seems to be going anywhere and I feel stuck.
Should I just throw in the towel and accept that maybe relationships aren’t for me?
Side note: please no nasty comments or I will report and block you.
Why is getting someone interested in a relationship so difficult?
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