Let's get one thing out of the way, autism is a serious disadvantage in the dating market for guys. BUT, that doesn't mean that it's impossible to find a girlfriend, get laid, or find any sort of romantic experience. Below, I would like to explain a few ways in how autistic men can get a girlfriend.
When it comes to dating, there are various ways one can go about trying to a find a relationship. For example, some people opt to go the online dating route, while other individuals may prefer the real life approach. The trick to dating is to find a method that plays to your strengths and minimizes your weaknesses. For example, a man with really good looks BUT is introverted and awkward would likely benefit from the online dating approach since online dating is 95% looks, and because talking through a screen is easier for introverted and awkward people. On the opposite end of the spectrum, someone who is physically below average but is very funny and outgoing would likely do better with meeting women in real life instead where he can win a woman over through his charisma and charm.
The majority of autistic men are not naturally charming or particularly socially intelligent, which means they need to find a way to compensate for these disadvantages should they wish to succeed in the dating market. For some men on the spectrum, this is through being very conventionally attractive. In fact, the better looking you are, the easier it is to compensate for personality/social flaws. An autistic man who is a solid 8+ on the 1-10 lookscale should have very little difficulty with finding women who are interested and he'll likely have had successful hookups, one night stands, short term relationships, should be choose to participate in these activities. However, keeping a woman long term may be an issue when these social and personality flaws begin to reveal themselves as the relationship goes on.
Autistic men who are very intelligent and very successful in their field may be able to find a partner through this method. Some women are particularly drawn to intellectual men and those that appear very intelligent. So an autistic man with very high intelligence may be able to attract a woman this way. Secondly, some women are drawn to wealth and achievement because of hypergamy, which is the tendency for women to date up in the social and financial hierarchy.
Some men opt to go overseas and finding a girlfriend or a wife in a different country may be beneficial depending on their circumstances. For example, in The Philippines many women are interested in dating a white man due to a number of reasons. Caucasians typically come from a first world country which means a filipina marrying a white man means a better life for her and her future offspring. Secondly, white skin is oftentimes considered attractive in filipino culture. Because of these reasons, autistic men that struggle with meeting a girl in their home country may be more successful in countries where finding a partner is considerably easier.
Finally, lowering their standards may be a realistic option for men on the spectrum. Not everyone is capable of dating an extremely beautiful woman as many of them have extremely high standards in a partner which is something that an autistic man may not be able to meet. However, dating a less attractive woman who is plain, overweight, or nerdy, may be a better fit for many men on the spectrum.