Prayers and supplications are the best way to talk to Allah (SWT), that is why sincere believers enjoy being in Prayers or reciting supplications.
Feeling Prayers and Du'a as a burden is not a good feeling. It needs to be treated with more Estighfaar and Salawaat and remembering our near future in Hereafter. Visiting the graveyard is good to soften our heart. Serving and looking after orphans also makes out heart more sincere.
Wassalam.
Wassalam.