What does it take to be a marriage material ?

As someone who's never lucky with woman I want to ask on super straight question what do man need to be marriage material?
And am asking as a 27 years old 6'6 man with a proper degree and a stable comfort income , I have my own house , my own small business and even as formal pro athlete I steel have a pretty athletic body? I may not be social enough but as I've been told from the few I friends I have am pretty romantic and seems to spoil my partner a bit , I don't see it as problem but it's all blurry right now? I don't drink, I do not smoke and for how much that makes me look like psychopath but it makes me feel good about myself as I think? I get rejected after 3 years together cuz she wants to take things more slowly? And one time I got rejected by her family cuz I didn't have one? Basically it doesn't seems to go somewhere with me especially when we're talking about marriage 2 years never help 3 years doesn't make it either? So am asking you guys what does it seems to be wrong with me?
What does it take to be a marriage material ?
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