Two colour heart keyring

This keyring has two colours woven together. I tried the melting together technique to join them but it was unsuccessful in that the join fell apart and there was smoke again. Back to Dr Google and it turns out there is a way of putting them together without melting or sewing. This works ok for this kind of loop and open ended item but wouldn't hold up if it was being made into a bracelet. I like these colour together, and it is nice that both sides are different, but I'm itching to do one in the yellow and pink which would be 'bright' I think!