Hey LeoForChrist, I am 45 and as of late had that exact question pop up in my thoughts. In fact it continues to pop up and disrupt my thought processes. I continually pray, surrendering this question to God knowing He answers prayers, and I keep a opened mind to God's will for my life and not my own desires. It is not easy to be single at our age, but in all things rejoice in God, because there is a greater purpose for your life than you can even imagine.
I actually made a commitment not to date for a complete year to focus in on my relationship with God and to establish a firmer foundation in faith. Ok, the question must being going through your mind, "How long has it been?" Well it has been 316 days, 49 days away from a year. Let me tell you the blessings that have happened too me. There have been many beautiful, nice women that have wanted to date during this time and I've respectfully declined while disclosing why I was not dating. Oh I give credit to the Holy Spirit for putting it on my heart to abstain from dating and what a blessing. Several of the women were not as they portraited themselves to be and God navigated me away from those unhealthy relationships.
Truth be told there are a couple women, friends I remind you, that have accepted just friendships during the course of the 316 days and I believe our lives have been greatly enriched. The overall point I am attempting to make is to trust in God, listen to the Holy Spirit and trust in Faith and not of your own desires.
I long for my other half, but am content to continue with to walk with God first and foremost. If and when God invites a women along our walk, is when my longing will be fulfilled by God.
Sincerely LeoForChrist