well in my opinion you shouldn’t date two people at a time because speaking from experience, when you’re one of the two girls being dated and you have any form of respect for yourself what so ever, you end up telling the guy to go fuck himself. :)
you should date the 30 year old because you like her for who she is, you are into her, you don’t sound like you feel a connection with the 19 year old and if that is the case maybe you should just neaten that up before it gets messy, just explain to her that you think she is a very attractive and lovely young woman but you have feelings towards somebody else, you need to pursue them and it wouldn’t be right for you to take her on a date while your feelings lie elsewhere.
hope that helps. :)
awww thank you chick <3 :)