Anxiety Support Group
Anxiety is a physical condition marked by intense and persistent feelings of distress, fear, angst or dread. General anxiety caused by routine day-to-day stresses usually passes quickly and is experienced by almost everyone at one time or another. However, such feelings that linger over time and are very difficult to cope with, and which lack a clear cause, may indicate...

https://www.youtube.com/watch?v=flZUKsbT8Xg
As to helping you keep your boyfriend - that's not her job. Your boyfriend will feel icky that you have done this and it's to his credit that he does. He doesn't want a relationship with a woman that is propped up by that woman's daughter.
He wants you and your daughter to sort your shit out. That's different.