(Cover) - EN Showbiz - Leonardo DiCaprio's pals are amazed by how "smitten" he is with Blake Lively.

Rumoured to have been dating for a while, the couple's clandestine affair went public in recent weeks.

Their dates have been extensive, going beyond traditional romantic dinners. The pair have been to Disneyland, Venice, Italy and France, frolicking around on intense amorous adventures.

Leonardo's former sweethearts include Bar Refaeli and Gisele Bndchen, but he reportedly finds something special in Blake and does not consider this to be a fleeting love affair.

"Friends are saying they haven't seen him this smitten over a woman," a source told Grazia magazine. "Leo loves Blake's spirit of adventure, desire to learn and her sweetness. Blake is a girl he can take home to meet his mom with pride."

Blake has had her share of hunky beaus too, but it seems that she and Leonardo are eager to establish their budding romance into something substantial.

"Leo's introduced her to all his friends as his girlfriend. The trip to France was their way of showing the world they're an item," the source added. (C) Cover Media