The 21-year-old striker moved to Kingsmeadow in January and scored two goals in 17 appearances for Neal Ardley's side.
"It's been great and I wish Wimbledon all the best for the rest of the season," he told the club website.
"Neal's been excellent with me, I've learned a lot and hopefully I can take that to Middlesbrough now.
"The supporters have been great with me. I'll definitely keep looking out for Wimbledon in the future."