What will you do when you are in a relationship (your bf/gf madly loves you) but you suddenly develop feelings for another person with whom you can easily engage in a relationship?

If you develop feelings for someone while you're already in a relationship then you should leave the person you're with lol
Because clearly you don't actually genuinely love them, if you have time to completely fall in love with someone else
Imdadul Huq Himu also answered this question with: "Will Avoid such encounter"