Britney Spears boyfriend is set to propose - and is to design the ring himself. Agent Jason Trawick - who has been dating the 'Toxic singer for around two years - is planning to pop the question and has visited an exclusive Los Angeles jeweller to help create the perfect ring. A source at the Mouawad jewelry store - where Jason spent more than an hour chatting to jeweller Pascal Mouawad - told X17online: They discussed diamonds from the Mouawad private collection. Its Jasons first visit with Pascal. Britney - who already has failed marriages to Kevin Federline and Jason Alexander under her belt - is believed to be keen to wed for a third time and it was recently reported she wanted a baby with Jason. The 29-year-old pop star wants the couple to start trying as soon as her world tour finishes at the end of the year. EPS