I put my advice to u in 3 options:

(A) Curse ur ex BF rite at his face.. Throw everything he gave u including gifts back to him.. vow to be the better woman in terms of future and career.. make ur ex regret in the future.. Stop thinking of him.. seek professional advices and support from a matured fren.. Just think of anger not sadness.. slowly it will fade away.. trust me.. anger is the may not be the best medicine but at least it work..

(B) Fight back lo.. Go all-out war.. use every means necessary to eliminate ur competitor at all cost.. use all ur asset..

© Just ignore him and wait and see how things progress in the next few months.. If after a month without any progress that means gg d lo..

Anyway, what for Give up the entire forest for a tree.. Always leave the option open whatever u do..

If u are asking "y am i so stupid" that means u already understand and accepted it.. Just think and do what's best for u.. maybe around the corner there is a far better guy waiting for u.. u might never know.. anyway nvr closed ur option for a guy..

U still have ur obligation to ur family.. maybe true love can be found in ur own family.. they will never disowned u.. tell ur parents what had happen to u.. they will help u for u are their lovely daughter..

Anyway, after a few week u will totally forgotten him if u just stop thinking and ignore him and think back how silly of urself for shading tears for a useless guy.. No point la shading tears for BF.. live still moves on, earth still moving, time moves on, ppl still come and go..