I'm dating my boyfriend and my ex
I hope you are joking. Why are you still seeing your ex, special connection or something?
Yes, she helped me so much throughout our relationship
It's good that you still feel committed to your ex, but you shouldn't be dating two people at the same time.  Both of these people are expecting you to commit to them, and you are risking both relationships by cheating on them.
I'm an asshole, so what's your point?
I am trying to say you could really hurt both of them if they are aware of each other. Socially unless you have an open relationship people expect you to pick one person.