I know this sounds a bit hypocritical since I lost myself a bit in a previous relationship. But trust me, it was a very high price to pay to regain my freedom and happiness, so hopefully you will find this information valuable beforehand, and not in hindsight like me ;-)
This is just something I got off the internet (Cosmopolitan) before , so I can't take credit for it, but I thought it was the best advice I ever got!
So with these tips always in mind, happy dating! And if you are in a relationship, read this to check whether you are still on the right track, or losing yourself in an unhealthy relationship.