Hi Cuma eksen,
You may have to ask yourself about how long you think you can handle not being able to go out with her on a one on one basis.
Perhaps give yourself a time limit and set your mind to that.
If she is still unwilling to go out with you on a one on one basis by the end of that time limit, this may be your license to let this go.
As you stated, dating is time consuming.
You don’t want to continuously waste that precious time on someone who won’t go out with you on a one on one basis. Your energy and time can be better spent elsewhere.