Yup only way really; go approach/escalate/act in whatever way is needed and keep doing it.

You also need the right mindsets and information to understand that getting rejected by a girl is meaningless and look at the bigger picture.

I don't even think of rejection anymore, the other week a girl flat out rejected me and blew me out on the open and any other night I saw her she'd ignore me or give me 'the look'.

Last night whilst I was working she came up to me and started to speak to me and said "Oh you're Barney(my name)" and started chatting. There is no rejection only "Not now".

Maybe like 2% of girls would out-right never fuck you in any circumstance. Not that its easy you just have no excuses for not succeeding at this stuff.