Thanks for the chap
Uuh, the cliche of falling in love with your friend's crush...which ironically not only happen in fiction but also in real life as well
https://www.thefreedictionary.com/two-timing
two-time (to͞o′tīm′)
tr.v. two-timed, two-tim·ing, two-times Slang
1. To be unfaithful to (a spouse or lover).
2. To deceive; double-cross.