In love with someone a bit older than me

I'm falling in love with this girl who is a few years older than me. (24) But the problem is I do not know if she is even bisexual at all let alone the fact that my feelings are completely inappropriate as she was my manager for a little while but now we are friends so it's a bit better. Basically I don't know what to do, I've tried hinting im attracted to her but I thinkshe tthinks im just joking. Do I tell her how I feel? Shall I hint some more and wait and see? Is there a chance she feels the same as we both said we can't be bothered with boys right now. Maybe this is her way of hinting? I do not know, please someone give me advice on whether I should speak out and say something or just wait, I haven't told her im bisexual either so maybe she's not sure to tell me her feelings? I think that's just hopeful thinking though.

Sweet Acceptedx, Being that you Know she Is bisexual, it doesn't hurt to sit down and tell her you are as well. Also, ask her if she might be interested in hanging out sometime, that you feel you both have a lot in common, And you both seem to share this special chemistry. You can also tell her Straight Out that you Do enjoy her company. Take things from there. No, no need to go on further with More of your "feelings," but just feel things out, feel her out, and go easy to assure yourself that you haven't crossed any fine line. Good luck.xx

That's the problem though, unfortunately I don't know if she is bisexual, I am not openly bisexual either so it's just a hopeful theory I have that maybe there is a chance she could be secretly bisexual too just because of conversations we've had like "which celebrity would you turn for" I wanted to see if she'd find this question wierd or not but she didn't which makes me believe she could be like me. If I knew she was bisexual I would tell her my feelings. It's the same old problem "you never know until you ask" but if she's not it would be majorly awkward, embarrassing and inappropriate. Plus I'm scared of finding out she's not. Not sure if id rather never know than no she definitely will never feel the same. Sorry if its got a bit confusing!