my friend thinks i don’t want to hang out anymore and got offended

i have bipolar and it’s sometimes hard to find motivation to do things like hanging out with friends. my depressive episodes just need to ride out and i need to get through it. hanging out with friends is a temporary mood changer but then it goes back down to 0 again. yes, i am medicated. bipolar episodes are still normal on meds, they are just less intense such as suicidal thoughts or severe manic episodes. yesterday she got upset with me over the phone saying i didn’t like hanging out with her anymore, and that’s not the case. i just can’t find the motivation to right now. i want to relax at home after a 10 hour shift at work and figure out these things on my own. my boyfriend is also my comfort person who i live with and i enjoy spending cozy nights with him after a hard day at work to get through difficult episodes. to add onto that, she lives almost 45 minutes away which costs gas money and $6 in tolls each way. today because of traffic, it’s over an hour drive to her house. i suggested meeting in the middle somewhere but she kind of didn’t want to. i’ve been driving to her every time i see her, it’s killing my bank account. 😭 i just don’t have the motivation to drive that far or to go out and do things and she thinks it’s because i don’t like her anymore or something. i’ve explained to her how bipolar works but it’s difficult to explain to someone who simply doesn’t understand it at all. i just got home and i just want to relax and cook dinner. not only that but a lot of the time i get to her house to hang out and about an hour in every time she tries to convince me to go to the club. i know it’s friday but i have work tomorrow. and when i say that she says that she has work too. i don’t know, i’m just a little frustrated rn.