Rest, relax and do not by all means sweat the small stuff
Most of what you left at your ex's place, does not hold significant value, if a fire occurred it would be lost, burnt up in smoke. So, if he does not want to connect with you, in order for you to collect your belongings... fear not. It is just stuff. I know you may want it, but do not be afraid to leave it behind in order to keep your mental sanity.
As far as this lying ex friend, know this... what is said is not true, you can not stop people from exercising free will; however, you do not need to let it bother you. Darkness is always dispelled in Light. Remember that and never sweat the small stuff. Now if it is more than collecting your items and you want to reconnect with the man, be true... let time cool the tension between the two of you