First of all, guns do not get lonely.
My first handgun was a Detonics Combat Master, in 1982 or 1983. Yes, a strange choice, looking back, but it seemed logical enough at the time. It was too unreliable to carry, but it was a fun gun.
In 1991, I sold my finicky Stainless Commander, the second one I had tried. I also sold a full-sized SAI and a Colt Ace, totally divesting myself of 1911 pistols, and bought a SIG P220, which I used for duty, carry, and home defense. I also had revolvers, which I never stopped using, but the SIG was my only auto pistol for a couple of years.
I felt drawn to the 1911, however, and soon had a Colt Government Model, which was quite reliable. In 1997 I bought a pair of base-model Kimbers, and later a Stainless Gold Match and three Les Baers. I used 1911 pistols for all purposes until 2002, except of course, I kept a J-frame for concealed back-up, and few larger revolvers for occasional general recreation and utility.
In 2002, I finally joined the polymer crowd for duty and carry, but kept my favorite 1911, a Les Baer Thunder Ranch Special. (I switched again, to my present duty/carry P229R DAK, on 2004.)
It was not a matter of being "in love" with the 1911, as much as appreciating my high accuracy potential with a good 1911, that prompted me to keep my most accurate specimen of the breed. As my right wrist and both hands get older, and ache with every .40 shot I fire from my duty SIG P229, however, I appreciate the 1911's lack of snappiness during recoil, which is due to the all-steel construction, the design of the grip, the low bore axis, and the gentler acceleration of the .45 ACP. I have stopped wearing my P229 anywhere but at work, where I must still tote a .40 duty pistol.
For concealed carry, I now usually tote either my Baer TRS on my right hip, or a Glock G17 on my left hip. (I wear a small revolver on my right side when I carry the G17 on the left, in case I reach for my right hip in an emergency, due to conditioned reflex.)
While it may be ideal to stick to one pistol, and become excellent with it, my hands are not built the same, such that Glocks are an excellent lefty choice, while the 1911 is an excellent right-hand choice. I am fairly ambidextrous, though a bit more left-handed, but elected to carry on my right hip, nearly thirty years ago. I reckon a 1911 will remain part of my defensive battery, until the gentle .45 ACP recoil becomes just too much for my right hand.