My most heartfelt condolences to you.
The question you ask requires more context to properly answer it. First, what specific signs are you receiving that makes you think your bf in Heaven wants you to let them go?
Are you deep in grief in such a way that you are having a difficult time healing and accepting his passing?
Are the signs being misinterpreted?
As a note, there are times when those we deeply love in Heaven want us to release the pain and grief because we still have a life to live. They do not want us to live in deep grief for the rest of our days. This does not mean they do not love us. It is because they love us that they would like us to allow our hearts and souls to heal, knowing we are still connected with them and knowing that we must continue living our lives, even if it is not in a way we wanted to or would have chosen.
He hasn’t stopped loving you and won’t. The love you share and shared continues on. If you are truly receiving signs about letting him go, it is most likely because he wants you to allow your heart and soul to heal, not because he doesn’t love you anymore, but because he does.