Can you have sex without real romantic feelings for the person?

I know that people can.
I want to know because, I am in a situationship right now, and she is going to stay at my place and I think we might end up doing it, yes I am a virgin at the age of 26.
Because no one gave me a chance, I got rejected by every single girl I approached.
So I never knew how it is.
And I do like her way too much, she is cute, short, beautiful a homely girl.
But I don't know if I love her truly.
I had a complicated situationship before as well, it was with my flatmate (student accommodation) in UK for masters. she rejected me and so we just didn't talk after that, I tried but had cold responses or ignored.
I was in so much love with her, I loved her more then I realised.
She left UK, without saying goodbye.
That hurted me so much.
And in that time I found out someone else gave me a like on bff, we went out as friends but it quickly it went from a hangout for just to have ramen to something in between a date and outing.
And then next hangout was too bad, I think as she was exhausted after her work shift.
And this week she wants to sleep at my place and take a trap north with me.
I don't want to say no to sleeping together, but I don't know if it will happen or not. I don't know she thinks what if I touch her and she gets scared or says we are just friends.
Or if I don't make a move and she just drifts away (that happened to me 2 times with someone else, the girl before who left uk).
I have asked her before where do you think this is going and she responded with we need to talk on it and said it will happen in good time (last date).
I want to be sure to fall in love again.
I still miss my flatmate, I had dreams where we are in love.
We did enjoy a lot and cried a lot together
But I am not strong enough to do it all over again.
Can you have sex without real romantic feelings for the person?
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