HELP ~ having trouble getting wet ladies

ASHLEY

Im almost 22, and since about 17 i haven't been able to get as wet anymore during intercourse. When i was younger, around 15/16 i used to get extremely wet (i fooled around with a boy or two and only let them finger me) and i would get embarrassed at how wet i would get. i didnt know at the time that it's a huge blessing, not a curse. well i took Zyrtec, an allergy med, for a while and heard that can dry you out. since then i haven't been able to get as wet and constantly have to use spit or lube. my boyfriend thinks it's because i'm not attracted to him and that's not the case at all. it even begins to get painful and i get sore... besides drinking more water what else can i do? is there a medicine that can help? i want to be gushing wet like i was as a teenager! im too young to be this dry!