Having checked your link profile it is very spammy. 25% of your backlinks are for the term "speed dating", 9% for "singles holidays", and thats just a start.
But that is not all. You have alot of domains sending many links back to your site for the same keyword. Sitewide links can cause penalties, and will need to be cleaned up.
I recommend using ahrefs \ majestic to find those links and dissavow \ get them to change to no follow etc.
A few examples of sites causing you problems are (but there are many others):
