Sometimes you will encounter someone who flat out expresses that they have trust issues or you will notice that the person is very guarded where it is hard to really connect with them. It is important to keep in mind that some people will use this as an excuse or a way to further deter developing a connection from moving forward with you rather than expressing there is a lack of interest. If a person legitimately has trust issues, the important thing to do first is to examine the cause of this–if possible. Topics can include discussing the person’s childhood or if they have previously been in relationships where there was a lack of trust and/or they were betrayed. This will not only give you a better understanding but also give you more clarity in regards to whether or not you can further develop a serious relationship with this person over time.
Another thing to consider is that if someone has a lot of trust issues, this could be a sign that they cannot be trusted either. For example, if you meet someone who constantly is accusing you of cheating when there is no rational reason behind it, it could be because this person has a history of this (or on the other hand, as I mentioned previously, that they have experienced being cheated on and now are extra paranoid it could happen again). If this is the case where their trust issues stem from the fact that they are guilty of doing things that are distrustful, then it is clear that this is not the type of person you should emotionally invest in.
Some people are also naturally more guarded than others where they just do not trust people immediately and need to take extra time in getting to know someone in order to feel close and to build trust. In these types of scenarios, this is okay and just requires extra patience on your part. If you feel that there is both a genuine and mutual connection between the two of you–where progress is being made as you continue to spend more quality time together, then it is worth sticking around to see where things go and to continue to emotional invest. It is important to sense that there is movement in a relationship where it is going places as opposed to staying stagnant. If you feel that the other person still has their guard up and it has been challenging for them to open up with you, it might be best to move on and pursue a healthy relationship where you can both build trust together.