Guessing the Sun doesn't wish to marry, just wishes a tete' a tete'? Nestleing Jupiter in legal-Libra (resonance Venus-oh where oh where is Venus), hopes he will (11th) pop the question (nuptul Libra) nudge nudge hint hint say no more say no more... (or is it you whom doesn't wish to accept a proposal?) Sun moves to you, he knows what you want, and maybe you both have spoken of vows, but a no go is understood? Now that is any man's coo-de-gra for limiting all that Leo represents..ahhhh freedom, freedom to flit where Sun wishes..delightful. Host sign Aquarius really is the answer to it all, after all you (Jupiter) are in his (Saturn co lord Uranus non/Lilly) realm or house, maybe you should consider friendship first, or is it just a call you wish, look to Gemini now bc Aquarius has displaced him on the 3rd to alight to the 7th, yes I think it is romantical and you wish a non fickle relationship from him?
When you asked if he would call, have you experienced amore' with him, so that the question is an expected call for romantic enjoyments for the both of you? Am not trying to pry..only trying to form an objective opinion for a delineation effort.
Thinking it is his habits you wish to reflect on clearing away any false misconceptions, all related to the context of your question. Mercury in his 6th house exalted in Virgo opposing Neptune in the 4th; means he may also wish to separate from false conceptions which you may suspect him of, or he wishes to reveal the truth that may be standing in the way of him being suspect to some discredit?
All the best
Vyri