2.Never talk or do something that makes them feel uncomfortable.
3.Never make them feel restricted
4.As much as possible ,never doubt.
If they really are into you,they will never cheat on you.
5.Never make them feel like a partner they can't share anything.You must first" be a great friend before partner".
6.Never compare them with your ex or someone other.Everyone is unique.
7.Never get angry on them,and even if you get,try to self control and divert your mind.Some unknown actions of yours can destroy the whole relationship.
8.Never used abussive words for them or their friends.Remember,words are like sword,think before you speak.