Ben Affleck and Jennifer Lopez didn't just rekindle their romance within the last 2 weeks, instead, it's been building since February ... when he started flooding her with emails while she was filming in the Dominican Republic.
Sources with direct knowledge tell TMZ ... Ben and J Lo were in very regular contact by email starting in early February when she flew to the Caribbean to begin filming "Shotgun Wedding." We're told the tone of the emails wasn't just friendly ... but more loving and longing for Jen.