#Befunge 98

    "/\ "7k:a"/ ":"\ "6k:a"/ "2k:"\ "5k:a"/ ":"89 ":"\ "4k:a"/ "6k:"\ "3k:a"| ":"egnufeB | "2k:a"| "8k:"| "2k:a"\ /____\ / "3k:a'_' 5k:'_\4k:a"?enitnelaV ym eb uoy lliW"aa >:!2+j4,<@

Output:

<img src="https://i.sstatic.net/61tJy.png">

<!--In case the link gets broken, this is the output:


Will you be my Valentine?
      _      _
     / \____/ \
    |          |
    | Befunge  |
     \        /
      \  98  /
       \    /
        \  /
         \/
-->


  [1]: https://i.sstatic.net/61tJy.png