> 3. Spirituality.
> I know that this isn't for everyone.
Or philosophy, for the non-religious. If you know nothing about it (like myself) I suggest starting here (https://www.youtube.com/playlist?list=PLwxNMb28XmpfEr2zNKQfU...) then pick up a book or two.Have kids because you want them. Not because you think they'll give your life purpose.
Starting or growing a family is a terrible way to solve problems.
If interaction with kids seems like a good use of time, start by volunteering with mentoring organizations like Big Brother/Big Sister or Boys and Girls Clubs. Or help out with the kids programs at church/temple/synagogue if you're into organized religion.
If that pans out well, consider babysitting for foster families. Foster parents do incredible amounts of good for society and get run into the ground in the process. It seems simple, but giving them a night off here and there is a huge help.
If that goes well, then maybe consider adopting or starting a family. At any rate, there are a lot of young people out there that could use positive (especially male!) role models.
Also, the term "significant other" can mean more than spouse (which implies marriage): [boy|girl]friend, life partner, close-friend-kind-of-person, etc.
I rediscovered being a member of a dojo. Combines some elements of spirituality / higher purpose together with some pretty awesome exercise endorphins. It's like church, but without the god thing.
That's like saying it's like an omelette without eggs or soup without water.
I've found 3 things that have helped me deal with my depression/boredom:
1. Have things to look forward to:
Always, always find things to anticipate and look forward to in the short and long term. Whether it is something small, like a treat at the end of the day or something big like a vacation or short trip away.
2. Side projects & working towards self-employment.
Ultimately, the aim is to be the master of my own time. I no longer have to wake up at 8am because I HAVE to but because I (may) WANT to. This for me is so important. To be the master of my time. I'm 32 now, if I'm lucky to live to 70 you can say that I have about 14-20 years of productive time in me. I want to use it for myself.
3. Spirituality.
I know that this isn't for everyone. Personally, I find religion and spirituality helps me to cope with every day issues. It gives me strength where I might otherwise just find a gaping void of pointless-ness into which to fall.
I hope this helps you. As mentioned by another comment try to avoid alcohol. You won't find the answers you need a the bottom of a bottle.