Yes, it's Snopes, but the picture shows it's not Teresa May, in my humble opinion. Quote from Snopes

"We were unable to find a photograph of Grybauskaitė from the comparable time period, but we did locate an image of May from 1971 (a year before this viral photograph was taken). Comparing these two images makes it clear that May was not photographed at this party with Merkel, as the only resemblance between the two is …..dark hair"

https:// www.snopes.com/fact-check/were-merkel-may-grybauskaite-high-school-friends/