Should I mention my Thai girlfriend in my workcation visa cover letter?

Hi Good Day! I need your advices,

I'm planning to apply for workcation Visa.

Im applying because immigration officer ask me to get a visa or else I will get trouble nextime I comeback to Thailand due to my frequent visits.

Question:

* Should I mention in cover letter that I have Thai Girlfriend? (Not yet married). In my recent visit and visa, reason was to visit GF. But since visa is workcation wonder if I should add info about my GF?

Profile:

* Filipino

* All requirements are met based on the official website for workcation visa. [members only]

* Has previous Tourist visa with 60 days stay (Applied 2 years ago before the 60 days scheme added by Thailand) - Applied this visa to stay longer with Thai GF.

* Visited Thailand this year 3 times already with 3 weeks stay per visit.

* Last year visited Thailand maybe 6 times some visit takes more than a month extended via immigration office. And did obey all rules never over stayed.

* The main reason for frequent visit was to meet and stay with Thai GF.

Thank You so much and have a great day! 🙏