The actor, whose character Anthony Moon departs Albert Square next Thursday, said he would have liked his gambling addiction storyline to deepen further.
"I was quite disappointed when I found out Anthony would be leaving - I'd have liked to do a lot more stuff with him," he told Inside Soap.
"It's a shame not to be a part of what's coming up - I'd have loved to explore Anthony's gambling problem in more depth, made him more of a player."
Lapinskas, whose Walford stay has lasted 13 months, added that he will miss friend and on-screen brother Tony Discipline (Tyler Moon) and girlfriend Shona McGarty (Whitney Dean).
"I've worked with amazing actors and made some great friends," the star gushed. "Tony and I are still best mates. And while I never went in expecting to find love, I met my girlfriend Shona there."