Visitor Visa - B2

Hi,
I am from Philippines, l would like to ask if can l get tourist Visa to visit my US citizen boyfriend who is also my employer as l am working online(in Philippines) as his Virtual Assistant in his US e-commerce for almost 2 years now and so our relationship as lovers. We will be together for vacation(touring some places in US) and we also plan to attend 1 day trade show in US. I am not going to work online while l am on tourist visa in US. l already had a tourist visa before and been to US twice with 3 weeks stay each visit and in my 2nd visit l was with my BF/Employer for 3 weeks.

My tourist visa got revoked when l tried to apply tourist visa for my son, after the interview the VO said that l have no strong ties in Philippines and that l can re-apply a new visa anytime l want. The VO revoked my B1/B2 Visa and denied visa for my son.

This time, l would like to re-apply a tourist visa for myself only to be with my BF/Employer for 3 weeks as he was inviting me to visit him again and l gonna leave my son behind as he is currently studying and still young at age 5 y.o. l have all of my family here in Philippines and l also own a small registered(under my name) business for 8 years already but my main source of income is my job - Virtual Assistant as it has better amount P20k monthly salary. My BF/Employer will be the one to sponsor my trip to US and he can provide me invitation letter, Bank Statement, affidavit of support, letter to consulate, employment letter and his passport. l can also provide Bank Statement, payslip, business permit, previous travels abroad( US, Australia, Singapore, Hong Kong, Thailand and Indonesia) and birth cert. of my mother and son whom l leave behind for 3 weeks.

With my reasons above, please advise what should l do or tell the immigration to get approved for Visa and what are the other supporting documents l need to bring with me during the interview.

Thank You so much.