am so confused

Maria
As i am writting am confused in tears, idk why i feel rejected and lonely.. I truly love my husband. But lately he cant seem to be attracted to me anymore. For the past two weeks he seems to show interest in having sex with me but when we are about too his penis cant seem to get hard or anybindication of it. Ive tried to understand him, but i just feel so unattractive and insufficient to make love. After two weeks of this constant.. The same thing happens today we had a wonderful day and then during him stimulating me i see his not hard  or horny..... I dont want to make it anymore awkard for me or him so i just say we could watch a movie and so on.. But ive just had it. I feel really bad rejected and lonely because i dnt have anyone to talk to. And the only person i want to talk cant seem to understand me. We have had this convo already  where ive asked him why but he dnt andwer me or try to make feel better he just goes like nothing has ever happened. Ive never liked talking about our problem with anyone, but am desperate and want some logic explanations of why... Since he cant  explain.. We are a young couple am 22 and he is 25 please am turning to you guys for help and experiences :,(
Update: 
Thanks girls i I aprecciate it alot! Everything is back to normal! :3