How do i let go of past emotional hurtings that have effected or possible ruined a new relationship?

in my so called life, i have been hurt by 99% of the boys i've dated. inturn this has made me not trust people. i've recently started a new relationship, and may have ruined the one true love i have been eternially waiting for. we clicked so well and i thought this was the "one", but i have let my insecurities get the best of me, and have possibly ruined everything! it' s been an online relationship and i have accused him of talking to others and ignoring me thru yahoo ims. he says no and it has happened twice. now i think i have possibly scared him off, with this last bout of insecurities.