My trans coworker is making me consider quitting my job

I (cis-female) have a trans coworker Jana that I've known since before she began her journey (she is male to female). I think she's incredibly brave, since we live in a rather close minded community. At first, she was rather timid but began to gain confidence as more people at work show her support.

Lately though, she's changed. She began talking about how hard is for her to find a date because everyone is 'transphobic'. Even our other trans coworker, Kim (also male to female), has confide in me that she feel very uncomfortable when discussing things regarding sexual preference and dating.

Jana is a lesbian and has shown interest in me. At first it was relatively innocent. Giving me compliments, making jokes about dating. As time passed, it went from innocent jokes to really uncomfortable conversations. She's made some comments, sometimes when we are in secluded areas at the same time like the bathroom or the changing room. It has individual stalls, for the record. Our job has uniforms and we change in the location.

Some of her comment are in the area of doing something in secret in the bathroom. Or ditching work to go on a date. Jana is aware I'm dating a man and keeps telling me that dating a transgender woman is just like dating a man only she prefer dresses.

Kim has told me to report her, but I'm scared of getting label as intolerant since I'm cis-gender. It doesn't help my coworkers know I'm Bisexual. But I am 100% not interested in Jana. When I tried telling her that she got angry at me and told me I was transphobic.

Now she's been demanding a date or else she'll report me for being transphobic. I'm terrified of losing my job, even though Kim is absolutely supporting me the whole time and keeps telling me to go first to HR. I don't even know where this comes from. Jana and I used to be rather good friends before and I've never made it secret that I'm not interested in her romantically. She's even met my current boyfriend and gone out to drink with both of us.

I'm due a transfer in a few months, but I'm not sure I can last long enough. I'm now even scared of going into the bathroom or the changing room alone. Or just being alone in general. I keep thinking about quitting. The only support I have is Kim and we've made sure to match all our shifts just so I'm never alone with Jana. I feel terrible since now Kim is getting home very late and she has a second job that starts early in the morning.

I feel pathetic in all honesty.

I'm adding some information on why I haven't gone to HR yet: My company HR has taken Jana's side in the past. They are the type of HR that is not there to help employees, but to keep the company from looking bad. Jana also has seniority over me. Almost twice the time in the company.

Also for please don't send me PMs about either going on the date with Jana, I won't even if it costs me my job, or with comments about politics or insulting the trans community. I'm not interested in people's politics. And insulting the trans community is not support.