I don't think that you are too old for anything that you said you are. You _feel_ old, as in lack of energy, or motivation, for example, which is an entirely different thing. Having a sport routine will most certainly address that. For example, in the morning after I wake up works for me, as it gives a boost of energy for the rest of the day. It will take about 30 days to get used to a routine, after that you will feel like you need it :)
As for the emotional need, that is the next critical thing to address. There are a lot of decent women in your age range, some of them after a failed marriage, which are looking for an emotional connection and a relationship, just like you. Put yourself out there, and let the matching algorithms do their thing. I met my wife using Tinder. It s a good start.
