Seeking advice: faith and a connection I can’t pursue

Assalamu alaykum. I know this might sound strange, so please bear with me - I’d really appreciate some non-judgmental advice. I’m aware I made a mistake and don’t need that repeated; I’m looking for help on how to move forward. I’m a 19-year-old Muslim woman who has feelings for a Christian man. We talked about religion and agreed that, given our families and beliefs, a relationship isn’t possible. His family is very devout, and Islam doesn’t allow interfaith marriage for women, so the option is closed. I should also be honest: I’m not very religious and neither is my family - we’re more culturally Muslim because of our background. I don’t need lectures about disbelief or punishment; I know I’ve sinned and comments like that won’t help me. We had the conversation about a month ago, but I’m still struggling to let go. I’ve talked to friends but it hasn’t helped. He’s genuinely a great person and I worry I won’t find someone like him again. Is it okay for me to speak with an elder or someone knowledgeable at the mosque (or another trusted Muslim mentor) for general guidance on how to cope and move on? I know this might be a lot to ask. My parents never took me to the mosque when I was growing up and I haven’t gone on my own, so I don’t know how to approach these things or who to talk to. I could tell my parents, but that might upset them and damage their trust. I realize this is an awkward question - please don’t scold me for my past choices. I’m genuinely seeking advice and would be very grateful for any guidance on how to deal with these feelings and find a way forward, Insha’Allah. JazakAllahu khairan for reading.