How to convey my love meaning?

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When I was in sophomore,I meet with certain tremendous setback.Then,he spent the whole night reassuring me by message.His words are so warm that they hit my heart.But he is my monitor and have his girlfriend now.I have my boyfriend,too.However,I love him all the time .I am a Shanghainese,but he is Fujianese.How can I convey my love meaning in the future?