According to the wiki, Jane breaks up with Thor after the Battle of Sokovia but before he goes to search the Infinity Stones
April-May/2015+8 years, 7 months and 6 days=November/December 2023/January 2024?
I think that Thor is only excited to see Jane again because i don't think the film only spans 3 months. i would say it takes place after FFH since Fury said Thor is off-world and in the beggining of NWH the news said that there's a political turnoil on New Asgard that could be related to something that happens on the film