Feelings for another...

So I’ve been with my partner for over 3 years and I love him completely and we have a good sex life. However I used to have a ‘fuck buddy’ who was also a really good friend and I’ve known him for about 10 years, we obviously stopped sleeping together since I got with my partner but we’ve seen each other a few times and kept in contact. I’ve always still fancied him and he turns me on a lot, he has a girlfriend as well but recently we admitted to each other that we actually love each other and are still really attracted to each other. He suggested that we spend a weekend together as like a one last time thing and I find myself wanting to! I’ve never cheated on my current partner or anyone and I love him so much but I do love this guy too and often fantasise about him. Is it possible to love two people? What do I do 😩🙈🤦🏼‍♀️

*EDIT*

My mum recently passed away very suddenly and tragically and she was only in her 50’s these stronger feelings for this guy have come since then and I told him I loved him when I was drunk after her funeral, he was sober though. Is it just the grief? I am an emotional wreck atm and all over the place about everything and I know it’s not that I don’t love my partner cos I really do.