BRO! Welcome back! Holy hell! Had no idea where you disappeared to! Can't believe it's been that long. Man. I'm sorry about the prison stint. Hopefully things are better where that is concerned. Never been to jail personally, known many that have been on many levels. Glad you're out though.
Readjusting to society on any level can be exhausting. I know that from just being out of the "work force" for the last 5 years (self employed).
I feel for you man. Things will get better gradually though.
If it hasn't been recommended, maybe talking with someone like a counselor or psychologist could help. I know being in prison can royal screw a person's mindset, so any talking you can do to process it would likely help.
The closest real life experience I've had is being in rehab, but I was there willingly, so it's completely different.
If I were you (and I cannot even presume to know how you feel), I'd take the wife out and try to be intimate again. I'm sure you lost a lot of that being away, hell it happens in my marriage and we are feet away a lot of the times. So, get out there and take her dancing or to the movies, anything. Something that will help reignite your passion.
If you want to explore it from a purely medical/scientific level, there's a lot you can do to find your happiness, but it's not an easy road.
I myself suffer from manic depression and am mostly on the depressive side of the spectrum, so getting happiness back is a not a foreign concept to me.
I'll tell you what I know that can and will help if implemented.
Clean up your diet, I'm sure being on the inside you were forced to eat garbage or non nutritionally dense foods. Fill your diet with lots of bright colored fruits and veggies as well as a good source of protein. If that's something that's difficult to do because of money, start taking a pro-biotic as well as vitamin D (get your levels checked first but it's generally ok even if you have normal levels), B complex, Omega's (good source oil not rancid, plant based is the best).
Most of the serotonin in your body is produced in your gut. So, having good gut health will increase your levels of happiness.
Exercise. Go on a run, hit a gym, do some push ups. Push yourself to the point of using all your energy. When you're doing that, there's very little room to even think about being unhappy and eventually (at least in my case) it starts to get better by continuing that path. Exercise will release a ton of toxins that are going to be bogging you down.
Try something like 5 HTP (unless you're on psych meds, then avoid as it can be extremely dangerous!), Gaba Calm...etc. There's a metric fuck ton of supplements that are well studied and actually do help.
Look into an Alpha Stim unit. If you were in prison, there's a chance you've heard of this, but that's not a definite. I know they use them in a lot of prisons though. It's a small box that produces less than 5 millamps of powers, so less than what is required to even power your heart. It connects to your ears and works in a similar fashion as acupressure. This device can literally reshape the waves in your brain. I am a testament to that. I've been using one for 9 years now and it changed my life in a major way. You can also look into this through a doctor (it's a medical device, so you need a prescription).
Pick up an instrument and listen to music. Man, nothing helps more for people like us. We need the music. Here's just one song I listen to on a daily basis that calms me, even though it's not exactly a super happy song, it makes me happy. It frees me though.
[youtube]http://www.youtube.com/watch?v=0BjYpFaJh2c[/youtube]
Keep talking here too. We are here for you homie.
