You've been making dua for something for a while and it feels like nothing has changed.
What to know
The Prophet ﷺ named the specific thing that gets in the way here: the dua is described as being answered as long as a person doesn't grow impatient and give up, assuming it has failed.
What you can do
Keep making the dua rather than treating silence as a no — scholars commonly describe three ways a sincere dua is answered: the exact request, a related good outcome, or protection from a harm you'll never see.
Check the practical basics: sincerity, and keeping your food, income, and daily dealings within halal boundaries, are commonly mentioned as things that affect how a dua is received.
Where the matter involves something within your control, pair the dua with real effort — dua and action are meant to work together, not replace each other.