Here are a list of good sites that focus on relationships. I really like the Reddit threads that people post in the community is absolutely huge so I suggest that you check it out.
https://www.reddit.com/r/relationship_advice/
https://www.reddit.com/r/dating_advice/
https://www.thestranger.com/seattle/SavageLove?oid=20653397
https://www.elle.com/life-love/ask-e-jean/
https://romanticanticsformen.blogspot.com.co/
Here is a list of dating websites that I have read in the past and currently. Some of these authors are very insightful towards dating and relationships overall I suggest you check all of these out as well.
https://www.datinggoddess.com/
https://fortydaysofdating.com/