Added property to socket user to get relationship, I also fucked up on the "AddRelationship" internal method.

src/Discord.Net.Core/Entities/Users/IUser.cs

@@ -21,7 +21,7 @@ namespace Discord
         Task<IDMChannel> GetDMChannelAsync(CacheMode mode = CacheMode.AllowDownload, RequestOptions options = null);
         /// <summary> Returns a private message channel to this user, creating one if it does not already exist. </summary>
         Task<IDMChannel> CreateDMChannelAsync(RequestOptions options = null);
-
+        
         /// <summary> Adds this user as a friend, this will remove a block </summary>
         Task AddFriendAsync(RequestOptions options = null);
         /// <summary> Blocks this user, and removes friend relation </summary>

src/Discord.Net.WebSocket/ClientState.cs

@@ -39,7 +39,7 @@ namespace Discord.WebSocket
             _dmChannels = new ConcurrentDictionary<ulong, SocketDMChannel>(ConcurrentHashSet.DefaultConcurrencyLevel, (int)(dmChannelCount * CollectionMultiplier));
             _guilds = new ConcurrentDictionary<ulong, SocketGuild>(ConcurrentHashSet.DefaultConcurrencyLevel, (int)(guildCount * CollectionMultiplier));
             _users = new ConcurrentDictionary<ulong, SocketGlobalUser>(ConcurrentHashSet.DefaultConcurrencyLevel, (int)(estimatedUsersCount * CollectionMultiplier));
-            _relations = new ConcurrentDictionary<ulong, SocketRelationship>(ConcurrentHashSet.DefaultConcurrencyLevel, (int)AverageRelationshipsPerUser);
+            _relations = new ConcurrentDictionary<ulong, SocketRelationship>(ConcurrentHashSet.DefaultConcurrencyLevel, (int)(AverageRelationshipsPerUser * CollectionMultiplier));
             _groupChannels = new ConcurrentHashSet<ulong>(ConcurrentHashSet.DefaultConcurrencyLevel, (int)(10 * CollectionMultiplier));
         }
 

src/Discord.Net.WebSocket/DiscordSocketClient.cs

@@ -1679,7 +1679,7 @@ namespace Discord.WebSocket
         internal SocketRelationship AddRelationship(Relationship model, ClientState state)
         {
             var relation = SocketRelationship.Create(this, state, model);
-            State.AddRelationship(relation);
+            state.AddRelationship(relation);
             return relation;
         }
         internal SocketRelationship RemoveRelationship(ulong id)

src/Discord.Net.WebSocket/Entities/Users/SocketUser.cs

@@ -1,5 +1,6 @@
 using Discord.Rest;
 using System;
+using System.Linq;
 using System.Threading.Tasks;
 using Model = Discord.API.User;
 using PresenceModel = Discord.API.Presence;
@@ -21,6 +22,7 @@ namespace Discord.WebSocket
         public string Mention => MentionUtils.MentionUser(Id);
         public Game? Game => Presence.Game;
         public UserStatus Status => Presence.Status;
+        public RelationshipType Relationship => Discord.Relationships.FirstOrDefault(r => r.User.Id == Id)?.Type ?? RelationshipType.None;
 
         internal SocketUser(DiscordSocketClient discord, ulong id)
             : base(discord, id)
@@ -55,13 +57,11 @@ namespace Discord.WebSocket
             => Task.FromResult<IDMChannel>(GlobalUser.DMChannel);
         async Task<IDMChannel> IUser.CreateDMChannelAsync(RequestOptions options)
             => await CreateDMChannelAsync(options).ConfigureAwait(false);
-
+        
         public async Task AddFriendAsync(RequestOptions options = null)
             => await Discord.ApiClient.AddFriendAsync(Id, options);
-
         public async Task BlockUserAsync(RequestOptions options = null)
             => await Discord.ApiClient.BlockUserAsync(Id, options);
-
         public async Task RemoveRelationshipAsync(RequestOptions options = null)
             => await Discord.ApiClient.RemoveRelationshipAsync(Id, options);
     }