1. Talk to your partner to see how he or she feels about you going on single dates with the opposite sex.
2. Repeat step 1 and get better clarity and assurance if you would like to meet up with ex-s even for kopi.
3. When steps 1 & 2 are laid down firm, inform partner before the event.
4. Be completely open about the friendships with the opposite sex.
5. Let your partner into your life.
6. If you value your partner enough to consider him or her to be your life-time partner, behave like how he or she hopes you would as his or her spouse.
7. Should you personally feel the above takes too much, why are you seriously dating then?

What are you willing to sacrifice for this relationship?
Disclaimer: as all relationships work on different dynamics, this is only a general guideline that has worked well and gain a lil' bit of respect..

Be completely open with your partner ~ I don't think you'd like it if he or she is going out on single dates without telling you.