It has been said that, “Once is luck, twice is coincidence, three times is a pattern.” If you have difficulties when dating one or two people, there is no reason to think much about it. Most people don’t marry the first person they date. Perhaps it is disappointing, but move on and you’ll be fine. However, if you have several disappointing experiences, it is time to ask “why?” The chances are there is a reason.
Without knowing the reason, you just have to hope you are more fortunate next time. That is like gambling. Instead, make a point of getting help to figure it out. There is probably a reason for your troubles, and knowing what it is will allow you to make appropriate adjustments and gain success.