Married and have a roomate? yes or no?

me and my wife have been together for 4yrs married for 1 and have a 3 yr beautiful lil girl. about 2 yrs ago her bestfriend (female) came to stay with us for awhile. shes a koo person, a good friend from what i see. but there comes a time when i feel like we need are space as a family just us 3 (me my wife and daughter) you know time for us to grow. sometimes i think i get jealous because we both wrk long hrs then we get home have are daughter and she needs attn but i like to have that lil time to me an the wife. the person i love an see for only a few hrs before we go to bed and back to work the next day. a lot of times she spend them lil few hrs talking to her best friend (roomate) an im like damn wish i could get some attn. at times i think its a bad idea to have a roomate it take away from are time, also her friend is single an i dont want her singleness to rub off on my wife. any advice on rather u think its ok to be married with a roomate or that we shouldnt.