Consider this one of the best dating sites out there today.
The site creators offer a new algorithm for selecting a partner, depending on your desires. When choosing, more than 100 criteria are taken into account, according to which they are looking for the right person for you. And if you are looking for a serious relationship (namely, the site is focused on such users), then you should fill out your profile as detailed as possible.
LOVEPLANET.COM has more than 20,000,000 users, 30,000-50,000 people visit every day, so the probability of finding the right person is very, very high. You can even specify the geography of your search, so as not to grieve that the guy (or girl) you need lives far from you.
In general, go in, register and explore all the features of the site.