You know, as a general rule, capital R relationships can't be found in stores like "Relationships-R-Us" or whatever. Hookup apps are certainly not going to help you nor most dating sites. Not saying it is impossible, just highly unlikely. Have realistic expectations while shopping in those locals.
So what is a young gay man to do once he has begun to realize it isn't so much "where" as "how" and "with whom"? Most of this wouldn't even be an issue if we lived in a society where teens felt comfortable being out and dating one another the way their hetero counterparts do. Things being as they are, however, the whole thing gets very distorted and understandably confusing. Hooking up (or "tricking" as we once said) is relatively easy by comparison to finding anything even remotely resembling a life-partner or husband.
Most will reasonably suggest you begin by becoming the type of man you would want a relationship with. Beyond that it is mostly a matter of putting yourself out there, dating, and discovering what works and what doesn't. I will tell you this, although hetero marriages at 22 are not uncommon, keep in mind that there is an entire social system supporting them. This is generally not the case with gay relationships. It can take years for young gay men to come to terms, not only with their sexuality (that by comparison is relatively easy), but with their need to bond with another man and form a loving, caring, responsible, supportive, communicative *R*elationship.