What options do I have to extend my stay in Thailand for another 90 days on a Dutch passport?

Hi all,

I'm Dutch and currently in bangkok on an extension of my single entry 60 day tourist visa. Originally planned to leave Thailand after 90 days but having a great time here.

What would be good advise to have another 90 days in Thailand?

- 2 border bounces and extend that with 30 days each?

- Or visa run to say Vientiane and apply for single / multiple entry visa at thai embassy? And will that work with my Dutch passport?

I wish to have the safest option, play by the rules and prevent immegration issues when entering and extending.

Thanks!