If you claim to adhere to the teachings of Jesus, then you cannot separate the belief in his return from others because Jesus himself didn't separate those beliefs.
As many times as Jesus talks about his current philosophy for which he is praised for by multiple groups of people, not just Christians, he also talks about his future kingdom that is to occur after his crucifixion and resurrection. In fact, some may argue the greatest hope Christians have isn't in the afterlife, but it's in the promise Jesus gave to his children to one day come back for them and set the wrong things right on earth.
Yes, I believe in the “second coming” because Jesus’ first coming was his birth in 4 BCE in Bethlehem and, whenever anyone asks him into their heart as his or her Lord and Savior, he comes in (Rev.3:20) and THAT is the “second coming!” Always has been, always will be. To fantasize otherwise is to confuse allegory with reality.