What is the best thing to do in order to reach an orgasm?

Ok so i need your serious help on this.... I have been masturbating for a while now...i like it... But i just cant get enough...im 20 and i have a boyfriend to whom i lost my virginity to...but due to certain circumstances we do get to have sex...... So what i need help with is not really any fingering techniques....i need this feeling of having my vagina licked... Could i use anything that would give me the same sensation...i wish to do this alone and do not intend to have anybody whos not my boyfriend do it to me.