It all seems quite tentative to me.
If the querent is a friend of yours, I would use the 11th which is signified by Mars. Then his crush interest would be the 7th from the 11th, or the radical 5th, so signified by Venus.
Venus applies to trine Mars, but swifter Merc comes in right under the wire and meets Mars first by sextile.
So I think that someone else will come into the picture before friend and crush get together. Your friend, Mars in his dignity and in his own house, is really self-involved, even if he has a crush on someone else. And Venus is not fond of the sign of Aries, the sign that Mars is in. That may be why the crush does not come to fruition. And maybe your friend really doesn't care that much about the crush? Maybe it was an idle question?